Thanks guys. I'm actually there already sport climbing, but I'll have a few days over the weekend on my own and looking for options. I'll definitely check out that bouldering. Vesuvius etc also on my todo list!
The climbing here is excellent, and the weather is more or less perfect currently. And, there is no one else here! I think we have the whole place to ourselves! I would highly recommend a trip here if anyone's looking for a bit of winter sun. Staying in Sorrento so there's plenty of life in the place after dark as well.
Thanks for the info, much appreciated.