I'm checking out at least the Briefings in July (missed it the last couple of years).  However I'm thinking of making most of my time in Vegas and attend a training class or two in addition to Defcon.
https://www.blackhat.com/html/bh-us-12/training/bh-us-12-training_complete.html
Since it's at Black Hat, this stuff's definitely on the pricier side.  For example, TCP/IP Weapons School 3.0 was $1500 at Usenix.  At Black Hat it's $2200+.  A sizeable bump.
Anyone ever take a class at the conference?