No, it goes right back to you. Amazon acts as an escrow service so I don't receive funds until I reach my goal of $8000, So If i raise $7,999, then it's a no go - I get zero dollars, and you receive your pledge back.
Yes, you'll have to create a kickstarter account in order to make a pledge. For super quick access just automatically log in with your facebook account. To see all the steps in the process, look at this quick and handy guide I made: http://eepurl.com/n84wP
I would love to be able to accept cash or checks but unfortunately, the answer is no. You'll have to use a major credit card and go through the amazon checkout to make a pledge. This is to ensure that the collective crowdfunding process works - I am to not receive any money unless I reach goal. To see how to pledge, view this guide i made: http://eepurl.com/n84wP
Don't see the answer to your question? Ask the project creator directly.