I'd also note that while I love the expansion of O'Reilly's line over the past few years to more nonstandard topics (books like programming collective intellige

I'd also note that while I love the expansion of O'Reilly's line over the past few years to more nonstandard topics (books like programming collective intelligence, or mining the social web), I've noticed that the quality of the technical editing has really declined. I probably buy 5-10 a O'Reilly books per year, and I can't remember the last time I got one without significant typos or code errors that would be deal-breakers to a less experienced programmer.