O'Reilly is doing a big discount again: 50% off all ebooks/vids; 60% off if you spend $100+ (US). That's their biggest discount of the year. Ends after today (at 5am PT Nov 29) http://post.oreilly.com/rd/9z1z2jm74uo2g7rga2s4lclg3fehsfsom3pnnm71m9g