Visions of Paradise aggregated the "Best of the Year" mentions from some twenty sources, including SF Site, Fantasy Magazine, Bookgasm, SFF World, Fantasy Book Critic, Strange Horizons, Locus Online, Locus Magazine, as well as award nominations for the BSFA, Nebula, and Philip K. Dick Awards. They then listed the books which received the most mentions, to produce a "best of the best" list. The result - Ian McDonald's Brasylis the clear leader with 16 out of 20 mentions! Here is the full list, which also includes Joe Abercrombie's The Blade Itself with seven mentions and Kay Kenyon's Bright of the Skywith five.
Update 2/24/08: Locus Online has updated their 2007 SF/F/F Books on Year's Best Lists, with the result that Brasyl comes in 2nd after Harry Potter (no shame there) with 8 mentions, and Kay Kenyon 's Bright of the Sky now appears on four.