Here's some video from Ron Paul's "Rally For The Republic", intentionally held in Minneapolis at the same time as The Daddy Party (R) convention.
Here's the text of a Lew Rockwell speech entitles "The Calamity of Bush's Conservatism", given at the same event.
And here's a Washington Post video from the libertarian event in Minneapolis. The main contrast between Dr. Paul's party and the one on the other side of town? The libertarian one appears to be sold out.