There is some intriguing overlap between Locus and The SF Site: Iain M. Banks, Matter; Greg Bear, City at the End of Time; Cory Doctorow, Little Brother; Neil Gaiman, The Graveyard Book; Neal Stephenson, Anathem (by most accounts, the SF novel of the year, and perhaps one of the most significant novels of 2008 in general); Michael Swanwick, Dragons of Babel; and others.
I have Anathem in the on-deck circle, and I am interested in the Banks and Bear novels (just purchased Bear's Darwin's Radio); Swanwick seems worth checking out, especially because I see that his short stories in particular are consistently garnering Hugo/Nebula nominations.
UPDATE: Over at Realms of Speculative Fantasy is a 5-part summary of several "best of" lists culled from various blogs and web sites. Certainly a Herculean task, and much appreciated. Here are the links to each part: Part 1; Part 2; Part 3; Part 4; Part 5; Part 6.