Repeater & Echolink Links:

EchoLink: Allows hams to link to other stations through the internet.
EchoStation: Allows hams to use a computer to control a repeater.
RigBlaster: Rig-to-Computer interface by West Mountain Radio.
Socorro Repeaters: Image representing the location of the Socorro repeaters.

Testing Links: (Online tests that feature the newest question pool)

http://www.qrz.com/p/testing.pl (I like this one)
http://www.eham.net/exams/
http://www.hamstuff.net/hamexam/

Amatuer Clubs:

Socorro Amateur Radio Association

New Mexico:

http://www.swcp.com/~n5zgt/abqham.htm - Albuquerque Repeaters, etc
Albuquerque New Mexico Transmitter Hunting Homepage
Upper Rio FM Society, Inc. - This is a huge club associated with a large array of repeater systems in New Mexico and surrounding states.
Upper Rio Repeater Maps - Mega-Link map, Upper Rio Linking System Map, and APRS Map.
Mega-Link Info - Information about New Mexico's Mega-Link repeater network.
New Mexico Frequency Coordination Committee - Coordinated N.M. repeater frequencies, etc.
NM VE Sessions

National Links:

www.arrl.org - The National Association for Amateur Radio
http://www.qrz.com/ - The Ham Radio SuperSite, Serving amateurs since 1992
http://www.eham.net/ - Ham Radio Site, Product Reviews, Ham Radio Events
http://irlp.net