For those not on the O'Reilly mailing lists, I thought I'd pass this on:

This is the best deal I've seen them do in months: 60% off ebooks/videos if you spend >$100. 50% otherwise. On all titles. They never go above 50% off, so this is a good deal. (Doesn't apply to print books.)

Expires May 7, 2014 at 7AM CST

http://post.oreilly.com/form/oreilly/viewhtml/9z1z7tocsqjqn45ju82c9k0sfe57h3...

If the URL doesn't work, their home page has a banner (as of right now).