As you said Stuart the Libertines are a fairly fun listen a few times through but then eminently forgettable in the long term. I've heard a few Babyshambles tracks and they stick in my head much more than any of the Libertine tracks ever did. The tracks "Fuck Forever" and "Albion" are pretty good. Apparently there is another spin-off band from the Libertines called "Dirty Pretty Things" and as usually happens in the UK they're selling out everywhere they go. Which means they're probably a lot of old tosh.