At my OPA chapter (at Georgia Tech) we do jerseys, but there's nothing on the back of them--no number or pledge name or anything. They're also not required (we try to keep pledging costs down), but "strongly encouraged." The social sororities on campus all have jerseys as well, from what I've seen. The fraternity I spend the most time at has jerseys also; I don't know about the others.
Hoodies & totebags with stitched letters are also very popular here among all Greeks.
