Charles Stross has a new post on his blog with details of publications of both new books and paperback editions of earlier books here.
The last books of his I read was the excellent Glasshouse and Accelerando , and I’m looking forward to the upcoming ones! Check out his earlier works as well, for instance Singularity Sky and Iron Sunrise, highly recommended!
Keeping track of publications of paperback editions in general is far from easy considering the difference in both price, format, release dates etc between the UK and US. Some authors books seem to take forever to move from hardcover to softcover, other ones switches so quickly that it might be hard to get hold of the hardcover edition if you don’t keep track. I do tend to by mostly paperbacks since they are easier to store and the lower price also enables me to buy more books than I otherwise could. There are of course exceptions, either books from favorite authors (last one was The Dreaming Void by Peter Hamilton) or hardcover editions on sale.
For people who can read Swedish my favorite resource for information on new books is SF-bokhandeln and I guess there must be similar lists available in English somewhere. I’m afraid I don’t know of any good ones, but that is probably since I haven’t looked hard enough.