1 - The project I work on is out of funding next fall, and I could potentially be out of a job then. So it's nice to have something else to do. If I don't get into the school(s) I want, I'll just get another cool job, though.
2 - The economy sucks, but in my field, I'm sure I could find work. Nevertheless, for long-term career advancement, you need a grad degree. MBAs are rare in my field, and I think that having one plus the experience that I do will let me go far.
3 - Options. Honestly, who here
REALLY knows what they'll be doing after graduation from B-school? MBA programs are huge door-openers - I might decide I want to switch careers, or do something different in the field I'm in already.
4 - Timing. The economy blows, and it's going to be a long recession. Come 2011, we'll just be on the upswing - i.e. the perfect time to re-enter the job market with a killer marketable degree to take full advantage of it.
5 - All the hot chicks in business school.