I tinker with things a lot. There's an explosion of tiny projects that I've tried out once, and never really want to look back at, so this tip on how to have a project without saving it in VC++ is very welcome.
Coming to Eclipse? Already there? I can't find it if it is.
Personally, I always keep a scratch.txt on my desktop/home directory for keeping code snippets for re-use/reminders. Having a system that supports brief testing/fiddling is a great nod to the way (a lot of) people work.