According to various Internet sources, Evan Bourne has a torn deltoid ligament and a dislocated ankle. No reports yet from the WWE, so I'm not sure how reliable this information is.

He injured himself while springboarding off the top rope out of the ring onto his opponent during his ECW match which aired Tuesday night. It's a shame because Bourne was on the fast track to becoming a big star, and this injury could set him back.

I'll update you as soon as I have more information...

Update 11/3: According to our sources, depending on the severity and how fast he heals, he could be back in one week or out for 4-6 weeks. Bourne will be re-evaluated later this week.
Update 11/7: WWE says Bourne is expected to be out up to 4 months.