The folks at Splitwise (an expense sharing application) put up a model that will let you change tax brackets and deductions in order to work out a fairer tax plan. Part of what is interesting about this is that you can save your plan and submit it to the community for a vote. Splitwise will submit the top voted plans to Congress. Where they won’t get much attention, but hey, why not put your money where your mouth is and come up with a better plan?
You can get started here, and see more information about this project at the Splitwise blog. If you submit a tax plan, give us the details in the comments.