The shirt I wanted to have made for rush this year, would have been the following.
The front would have had a picture of "Flounder" from Animal House with something like Rush Beta underneath. Then on the back it would say "Because fat, drunk and stupid is no way to go through life." And then Beta Theta Pi Summer Rush 2005, University of Nebraska all that stuff. Works well, so long as you aren't the fat, drunk, and stupid chapter on your campus
What we ended up doing this year was have a picture of the guys from SuperTroopers on the back and "we want you on our squad" then noting that all those guys were Betas at I think Colgate or something like that.
you can also check out
www.rushbetanow.com for some nice shirts.