More Latin American Z39.50s

All tested working.
Plus, National Library of Uruguay already has its own thread: http://www.librarything.com/topic/224209
Its details again: Z39.50:z39.bnu@164.73.2.141:9992/BNU01 (USMARC)
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University of Tarapaca (Arica, Chile)
146.83.111.163:9991/UTA01
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NOW WORKING!!! National Library of Argentina (see http://www.librarything.com/topic/224206)
Z39.50:Z39.50@190.136.33.233:9991/BNA01 (MARC21)

NOW WORKING!!! Sistema de Información Universitaria BDU (see http://www.librarything.com/topic/224207)
cosechador.siu.edu.ar:210/bdumarc

CEDINCI. Centro de Documentacion e Investigacion de la Cultura de Izquierdas en la Argentina
catalogo.cedinci.org:9999/biblios
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Universidad del Pacifico (Peru)
catalogo.up.edu.pe:7019/unicorn

Pontificia Universidad Católica del Perú
caliope.pucp.edu.pe:2200/unicorn
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Universidad de Puerto Rico
uprhip.upr.edu:210/uprbib
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Macris School (Honduras)
macris.follettdestiny.com:210/saas17_8503119
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Colegio Americano de Quito (Ecuador)
fcaqlibrary.follettdestiny.com:210/saas55_8501430
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National Library of Colombia
ticuna.banrep.gov.co:7090/ABNET_DB

Institución Universitaria CESMAG (Pasto, Colombia)
oasis.iucesmag.edu.co:210/Bibliographic

Universidad del Meta (Villavicencio, Colombia)
186.116.1.93:210/bibliographic

Universidad Del Rosario (Bogota, Colombia)
201.234.181.8:2200/biblios

Pontificia Universidad Javeriana (Bogota, Colombia)
unicornio.javeriana.edu.co:2200/UNICORN

Universidad Jorge Tadeo Lozano (Bogota, Colombia)
unicornio.utadeo.edu.co:2200/unicorn

Colegio Nueva Grenada (Bogota, Colombia)
cng.follettdestiny.com:210/saas02_8500006

Red de Bibliotecas Medellín Área Metropolitana
rbmam.janium.net:210/Janium

Should all work with USMARC

(via http://www.jumpjet.info/Offbeat-Internet/Public/Z3950/url.htm and WebClarity)
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Banco Central de Venezuela, Biblioteca
z3950-totalit.co.in:9999/bcv_presta (USMARC)

Instituto de Estudios Superiores de Administracion (Venezuela)
iesa.sirsi.net:2500/unicorn
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Benemérita Universidad Autónoma de Puebla (Mexico)
www.bibliocatalogo.buap.mx:210/innopac

Colegio de Sonora (Mexico)
biblioteca.colson.edu.mx:9991/SON01

...and some Spanish ones:
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CSIC (Spanish National Research Council) Library Network
aleph.csic.es:9909/MAD01
(works, character encoding issues)

REBECA (Apparently a union catalog of sorts, of Spanish public libraries)
catalogos.mecd.es:220/ABNET_REBECA
(ISO 8859-1)
(http://www.mecd.gob.es/cultura-mecd/areas-cultura/bibliotecas/mc/rebeca/r/acceso-al-servidor-z39-50.html)

Universidad de Sevilla
fama.us.es:210/INNOPAC
(works, character encoding issues)

Universidad de las Islas Baleares
llull.uib.es:210/INNOPAC
(works, character encoding issues)

Universidad Rey Juan Carlos
centauro.urjc.es:2200/unicorn

Universidad de Granada
adrastea.ugr.es:210/INNOPAC

Universidad de Córdoba
medina.uco.es:210/INNOPAC
(works, character encoding issues)

Catálogo Colectivo de las Bibliotecas Judiciales españolas
Z3950.cgpj.es:210/ABNET_DB

With a boatload of CATALAN sources:

Aladí (Municipal Libraries Network, Barcelona)
sinera.diba.cat:210/innopac

Universitat de Lleida, Biblioteca
udl.cbuc.cat:210/INNOPAC
(works, character encoding issues)

Universitat Rovira i Virgili, Biblioteca
urv.cbuc.cat:210/INNOPAC
(works, character encoding issues)

Universitat de Barcelona, Biblioteca
ub.cbuc.cat:210/INNOPAC
(works, character encoding issues)

Universitat de Girona Biblioteca
udg.cbuc.cat:210/INNOPAC
(works, character encoding issues)

Universitat Oberta de Catalunya, Biblioteca
uoc.cbuc.cat:210/INNOPAC
(works, character encoding issues)

Check out my shiny new toy: a Spanish-language Z39.50 target list!
http://www.kronosdoc.com/gtbib_z3950

Clearly the above will be in for expansion.

Found a working Brazilian one:

Universidade Estadual Paulista "Júlio de Mesquite Filho"
athena.biblioteca.unesp.br:9992/uep01

Needs charset tweaking

ETA: Another...

Universidade de São Paulo
dedalus.usp.br:9991/USP01

ETA:
I deduce that working Z39.50 servers also exist for:

Fundação de Economia e Estatística do Rio Grande do Sul
Federação das Indústrias do Estado de Alagoas
Pontifícia Universidade Católica do Rio de Janeiro
Pontifícia Universidade Católica do Paraná

But I can't find access details for any of these.

See also: http://www.librarything.com/topic/240722

Added a bunch above. A lot of goodies here, from a lot of countries where LT has no coverage at present (either through lack of sources, or broken sources). This group includes Uruguay, Argentina, Peru, Honduras, Ecuador, Venezuela, Mexico, and Brazil. The sources I consider higher priority for addition are bolded.

See also the list of Geographically "Other" sources. Sources I've added there that meet the above criteria include examples from Macao, Malaysia, the Philippines, South Korea, Thailand, Pakistan, India (yes, I found some!), Kuwait, Qatar, Saudi Arabia, Lebanon, Morocco, South Africa, Zimbabwe, Azerbaijan, Latvia, and Ukraine, as well as UN organizations.