I believe he had a major surgery and still has 6months leave or something, we'll see how well he comes back.
In the mean time we've got a few good fights coming up :
UFC 151 - Jones Vs. Henderson
UFC 152 - Benavidez Vs. Johnson
Stann Vs. Bisping
UFC UK - Hardy Vs. Sadollah
UFC MN - Browne Vs. Silva
UFC 153 (awesome card!) - Aldo Vs. Koch
Vitor Vs. Belcher
Jackson Vs. Tiexeira
After the Jones-Hendo fight IMO It's going to be pretty stale until UFC 153. Hopefully 'TUF - The Smashes' will fill the gap nicely!
Hoping it's not going to end up a tear-fest though *cough* TUF Brazil * cough*