Sign me up for Pat's "We don't need no stinkin' MBA" club.
It's not really a regret - I got (paid) to teach undergrads DOS, Lotus and dbase [sounds like History of Computing....] and I found out that I really enjoyed teaching (if only it paid what my techie jobs pay). But my MBA hasn't really justified itself; although working for a small company, even as a computer guy, situations have arisen where a phrase or concept from bus school came in handy.
My regret, I guess, is that I didn't do college at 18, but instead got married, had DS and kicked around various odd jobs (cooking, appliance sales

, etc.). While the good news is that I started at 24 and got a BS CompEng degree I use every day (and the aforementioned MBA in InfoSys), I often wonder what a carefree 18-22 might have been like on campus - particularly since DS just graduated from U of Mich w/BS in CompEng!
Note to all College regretters - IT IS NEVER TOO LATE!!! I was a 24-year-old freshman (ooh, sounds like the title of my life story) and DW started in her 30's when DS was a teen. It seemed like a long time - and a LOT of work - 'til we were done when we started, but it zipped by and now we're empty nesters heading off to the Polynesian! So check out that community college today - start with a single class; and Pat's right, too, about you doing better than the 18YOs who are there because it beats working.