Here's the latest match-up numbers from RCP. He's recovering from the Wright flap.
http://www.realclearpolitics.com/epolls/2008/president/national.html
Juse anecdotal, but I fully expect to run into either Hillary or Chelsea at the local Giant Eagle (a big grocery chain in my area). They are uber present...they are everywhere. Bill, well he must have a basement of his own. Obama starts off his bus tour on Friday (from Pittsburgh and heads east across the state)...so I expect 'profound and noble' speeches all weekend w/PA bylines...