I had never heard him speak before his keynote at the DNC, and I was blown away.  I was so proud to be a Democrat that night, and I immediately started following his career.

He's made some interesting choices, but overall I've admired his conviction, his intelligence, and his passion.  And he's clearly reaching out to the blogosphere to engage in conversation - and I really do think he means it, not like others who are simply trying to cozy up to the latest wave.  

I expect great things from him.  First African-American vice-president or president, perhaps?