Launch 48 teams up business-gurus and techies, where the aim is to pitch, plan and launch a viable web-product in the following 48 hour period. It's 48 hours of hard-slog startup-founding that is guaranteed to leave you buzzing (honest)
I've been twice now, and just signed up for a third time. It may sound a little crazy... but it is an awesome experience, and I confess I'm now addicted.
If you can make it to the conference (on the Friday) they also line up a set of speakers from some of the best IT companies in the world (google, paypal, et al), along with VC, successful IT businessmen and other assorted useful types to give a talk about how you can turn your idea into reality.
and it works too. Several of the startups have gone on to become successful online businesses... of course some don't but I can honestly say I've learnt a lot in the process. I even met my co-founders there, so I can attest to the benefit of working with people to see if you can work with them...
Early bird tickets are on sale for the next one (the 25th Sep)... so I hope to see you there :)
PS: just to make it clear - I'm not affiliated with launch48 in any way except for having gone along to it (twice now) and found it to be awesome!