Some quotes from a interesting blog post based on a Phd thesis:
"Doing the same old thing using new technology *will not* politically re-enfranchise people."
"political disengagement is growing because modern democracies do not support strong participatory or direct democracy"
"Based on Dunne's study it would appear that public disengagement is not something that web 2.0 tools can solve alone. Rather the political and social system in which these tools exist must change for people to reconnect with politics."
The most evolved project for a hybrid direct/representative democracy is led by former Sen. Mike Gravel. U.S. Registered voters can now vote to ratify the National Initiative for Democracy at Vote.org, much as citizens ratified the Constitution at the Conventions when the Legislatures wouldn't!
Until then you can beg the Obama admin to do the right thing at Change.gov