I think the real question is, does Smallville have the same kind of hardcore, "Fandom Is A Way Of Life" fans that Star Trek, Adventures of Superman, and Lois and Clark have? By that I mean people who are so into the show, that they collect every tie-product, write and read fan fiction, go to conventions, etc.
If not, then there's really nothing to show on Fanatical.
Collecting the tie-in products, writing the fan-fiction, attending conventions.... all of that I can tolerate; but nothing whacky like starting fan websites.