I downloaded 1998 and 1999 T-Party from the Stanford Archives; it seems that the 1999 edition had powers and current events tossups, while the 1998 edition did not. Both were packet submission events.
1998 T-Party featured this exciting tossup:
It is a lute shaped stringed instrument popular in the Middle Ages. It has two to four drone strings sounded by a hand-cranked wheel. The melody is played on the strings by depressing keys. For 10 points, name this instrument that is sometimes confused with the barrel organ.
I seem to recall reading/mocking a 1995 T-Party set at one point, but I can't find it.