Crime for a cause: Wolfmont Press' now-annual anthology raises money for Toys for Tots. This year's contribution is titled The Gift of Murder and can be ordered from the Wolfmont site.
Several newspapers and blogs have already come out with their holiday book-buying guides, and I'm sure there will be more. For starters, check out the list from the Daily Mail, and a two-part list of recommendations from various crime fiction authors as compiled by Jen Forbus which you can find here and here. Jen's lists are included on the Buy Books for the Holidays blog which has ideas for other genres, too.
CrimeSpree has book and video ideas, with promises of more to come soon.