I read "Perdido Street Station" and thought it was the best thing I read this year. ("Chronoliths" was a close second; much tighter and more focused, but not as wildly ambitious or imaginative.)
As a matter of fact, I expect to vote for "Perdido Street" in about 2 hours on the Hugo ballot. ;-)
But anyway, I havent gotten around to The Scar or his first (?) novel, King Rat. They are on my list though.
Also, its been discussed on these boards before; China Meiville actually played D&D at one time and if you re-read the last part of the book you'll definitely feel the influence. Theres a quote in there about the mercenaries that is a bit jarring actually if you dont play D&D; its something along the lines of:
"I know that type of scum. They'll do anything for treasure and experience."
("Why is he talking about experience? Wouldnt '...for treasure and thrills' make more sense?", asks the non-D&D player.)
Also, I personally felt that the final scene with the Vodyanoi adventurer was an indulgence; perhaps a fond goodbye to a beloved character. I'd be curious to ask the author about this.