If you have an NCSU Google account <unityid>@ncsu.edu you can use Google Talk with any Jabber client, or with the Google Talk service integrated into Gmail.
Note that you do not have to have to use Gmail for your NCSU e-mail to have access to Google Talk/Jabber. You must have your Unity ID linked to NCSU's Google presence, but you don't have to have e-mail active.