Barack Obama's formed a presidential exploratory committee. You can see his pre-announcement here.
I just had to restrain myself from walking into my boss' office and telling him that I'd be taking some time off to volunteer for Obama's campaign. I like Obama a lot. I like that he's a former community organizer, something that prepares anyone for talking to everyday people as if they're actual human beings. I like his optimism. I like his gentle, thoughtful speaking style. I've read his first book, "Dreams from My Father" and was impressed with what I read. I don't know if he'll be the nominee, and I have some initial concerns about some of his stances (mostly because of vagueness). But I'm excited about him, and no other candidate has gotten me genuinely excited yet.