There is definitely a "Best Crossover" category! See their categories list (http://community.livejournal.com/forsaken_fandom/13896.html). Also, with your work in mind? The "Best Future Fic" and "Best Past Fic" categories. :-)
And crossovers are eligible for all the "Best Overall" categories, too -- the ones where eligibility is by size, not content -- as far as I can tell.
no subject
And crossovers are eligible for all the "Best Overall" categories, too -- the ones where eligibility is by size, not content -- as far as I can tell.