I've just started doing an online running course (if you're interested, it's Up & Running and I'd recommend it) and the main problem I've had is fitting running around looking after the children. At the moment, I can only do it when I've got childcare, but if I want to fit running into my life permanently (and I'm pretty sure I do) then I need another option.
Running or jogging buggies are a wonderful invention. It's a good idea to try a few out before committing because they make be more or less comfortable depending on your running style, but there's currently a Quinny Speedi buggy system (together with Dreami carrycot for newborns, footmuff and raincover) available on Nappy Valley. Happy running!