I think I've mentioned this before somewhere, but I'm going to mention it again - I *love* Cindy Crawford's "New Dimension" DVD for a post-baby workout. I've done it off and on for about 6 weeks, but the last 2 I've done it religiously and it is fantastic! Really gentle, split into 3 different levels of workouts (right now I still alternate between workout 1 and workout 2 - I'm not ready for 3 yet!) - and they are SHORT so there is always time to squeeze it in during one of the poo-monkey's naps.
Love it! I couldn't order it in the UK I had to have it shipped from Amazon US, but it was worth it, and still not very expensive.