Just yesterday I finally pulled myself off my ever-growing ass and popped in the workout video (cause there's no way I'm going to a gym!). I did it again today and it's not so bad. Actually felt pretty good.
If you haven't done anything yet, then I recommend Gabrielle Reese's The Complete Fit Pregnancy Video. There's a 15 min workout for each month of pregnancy plus a warm up and cool down. Not so bad.?