Anyone wanting a signed copy of the Air War can find them at Forbidden Planet, Shaftesbury Avenue, where they had a fairly enormous amount of stock, and also at Waterstones, Leadenhall Market — with the latter, the whole series is on a Buy One, Get One Half Price deal, so it's a good place to make up any missing books in the series.
On the Tor UK site I discuss the real and ancient art of killing off characters here which is why there's only an abbreviated post on this site.
Also Tor news, of course, is that their e-books are now going to be entirely DRM free for your reading convenience. This is a bold move. It'll be interesting to see how it pans out.