I'm 30 and in school now, and I love it. Computer Science has always been something I enjoy. I will probably be 32 when I graduate.
I am also lucky that my wife is very supportive and doesn't mind us being poor as dirt while I'm in school.
After I finish here, I plan to go to graduate school. I will probably end up in the 36-38 age range by the time I'm done (depending on what program I pick).
One thing I've noticed is that as long as you're not incompetitent the professors treat you differently and give you more opportunities then the younger students. (However, more opportunities almost always means more work!) Also, expect weird nicknames from the younger ones. I've been called Gandalf a number of times. I think it's the beard. ;-P