Rebooting America: Ideas for Redesigning American Democracy for the Internet Age is an anthology of essays put together by the folks at Personal Democracy Forum. The central theme is using technology to improve government and politics. The writers are people you've heard of -- or people you should know about. You can download the book or buy a hard copy here.
If you want to follow this stuff on a daily basis, TechPresident is a good place to start.
Last summer, I tried to sum up a lot of the questions and predictions about net politics in the 2008 election. I'm working now on the next iteration of that ongoing project, which should appear in October.