Headline Review Editions (UK)
On alt.fan.neil-gaiman, Maria Siu Lee posted about neilgaiman.co.uk, specifically the Stuff section, which talks about the new UK editions of Anansi Boys, American Gods, Neverwhere, Stardust, and Smoke and Mirrors.
Most have additional materials or introductions, reading group discussion questions, such as this one from Stardust, and new interviews, such as this one from Neverwhere.
The website also has the details of the UK book signing tour, a brief FAQ, and a really neat Lenny Henry intro (of sorts), discussing Neil, Anansi Boys, and other such things.
If nothing else, that part is definitely worth the read.