I've created a similar site that somewhat joins the two together. I have created
http://www.fastbacker.com that allows backers to get the early bird deals using a browser extension that will automatically change a backer's current pledge or create a new pledge for a project in the event someone backs out of an early bird deal on a project. Since my site is fairly new (over 150 members and growing though), I am doing free cross promotion of my site with Kickstarter project creators. I'll promote your project on the front page of my site (no minimum projects to back required), to Facebook, Twitter, and through a newsletter to my users if you post my logo and link to my site telling your backers a little bit about my site. You can read more and get live statistics on membership here:
http://www.fastbacker.com/creators/If anyone has any questions, you can contact me on here or via my email or Facebook links at the bottom of my site.
Thanks,
Michael Flagler
Founder of FastBacker