The Republic of Thieves is scheduled for a February 2011 UK release.
Vexingly, I can't find a US release date on Amazon or from the publisher. (Yes, I know about the existence of international mail, but I presume that I won't be able to buy an e-book from a UK publisher, which is how I read things these days.)
(Oh, call it five points for the title reference, unless you're Chad.)
ETA: Hmmm. Half the retailers linked from the UK publisher's page list it as February, and half as June. And Locus lists it as June. Well, that still doesn't suck.
ETA 2: looks like June should be taken with a grain of salt too; see comments.comment(s) | reply | link