Some people even manage to have lives (and/or webpages) after college:
laelgin
 

Here are some improv links that may interest you:
The Annoyance
Argos Agency
Improvchicago.com
Improv Olympic
Under Oath
YesAnd.com
 

 And last but not least:
my message board

Have I missed anyone?  Are you unhappy about that?  E-mail me...