Eh, not to be pedantic, but the designation of the guard that Han and Luke knocked out in A New Hope was TK-421. As in "TK-421? Why aren't you at your post?" The initials of this guy at work are T.K., so just about any time we see him, he gets asked this question.

Anyway, ignoring Kevin Smith movies, which are so thick with Star Wars references as to make cataloging them all near impossible, there are plenty of others...