Noreascon, the upcoming World Science Fiction convention in Boston, has posted an online Hugo Nominations Ballot that you're eligible to fill in if you were a member of last year's WorldCon in Toronto, or if you've bought or are willing to buy a membership in Noreascon.
For the record, here are the things I published in 2003 that are eligible for the ballot:
Best Novel: Down and Out in the Magic Kingdom, Tor
Best Novelette: Liberation Spectrum, Salon.com
Best short story: Nimby and the Dimension Hoppers, Asimov's
Best short story: Flowers from Alice, New Faces in Science Fiction (DAW)