Hey there, i'm in the same boat as you. I was interested in doing yoga, but couldn't fit it into my daily routine with the tots and besides, the courses are a fiver each over here and only one day a week. I don't see that doing much good. I still run but I am limited with the cold, ice, dark, etc so I wanted something that I could do instead.
So I bought a yoga video. You really have to do it everyday (or at least 5x a week) to see a difference but I cannot believe how hard it is! I approached it with a bit of smugness after running and all that - but damn, it is hard and especially on the upperbody. It really gets your arms and shoulders in good shape. And the best bit is...it's done wonders for my stomach - the very bad area of my body after two 10 lb babies. Basically a disaster zone. I really enjoy it alot and look forward to it. Just wish I could take a proper course as you do get a bit tired of the same dialogue day after day.
I can't really prescribe to the meditation bit of it - not with two kids running thru my legs and all that, but I would definitely recommend it. You don't get sweaty and winded too much but at the end, you can definitely feel you've done something and you have the comfort of knowing that you are working on ALL areas of your body. Not just the lower half.
Hope that helps a bit?