Bec - any gap at all is a diastasis and the Tuplers should help close it. It means that the connective tissue between your muscles is stretched, but 1.5 fingers is not bad at all. I think the Tuplers are easy to fit into my daily routine (while driving, while nursing DD, etc.) so I do some whenever I think about it and also make sure I'm getting my 100-per sets in.
Gizmo - I thought about you with this. I don't know all of the Crossfit exercises yet, but this blog posts a workout variation every day for moms. Some you probably need a gym for but a lot can be done at home. Might help you get some variety in to keep the boredom away!
http://www.crossfitmom.com/
When I get to a better fitness level with my basic routine I'm hoping to incorporate one or two of these routines in every week for variation. I like the Crossfit focus on functional fitness.