On the checkout form, I think that you should have the zip code field prefill the city, state, and country fields. Or explicitly limit to US only. I think that people will wonder why you're not asking for their full address, most people don't know you can get city and state data from their zip.

The enlarged radio buttons don't look good on Firefox 7 Mac. In general radio/list/select fields not not scale well.

The 3% fund from you is a nice touch.

There needs to be a link which you can share with other people to help fund your purchase on the account page. Don't see a link.

http://i.crowdfunded.it/crowd_members/?id=4 Does not work.

"You currently have 0 completed funds. " Should be at least 1, right?

I like the idea just needs a little more polish and a lot more pitch. To be honest I just don't trust the service in it's current state.