So, far it's a tie on my scorecard. Obama has handled economics about as expected, is poised and took it to McCain when necessary. McCain seems a lot less bristly and has not resorted to personal attacks, a la Lipstuck. However, he completely failed to answer the first question on the environment. Spent nuclear fuel rods? C'mon.
I watched the first half on MSNBC, so I missed that graphical uncommitted voter meter on CNN.
Advantage: Obama, because all things being equal, Dems more effectively represent change (even though Dems have been in control of Congress since 2006).
UPDATE: I fail to understand the media hype about how John McCain thrives in town hall meeting venues. He's not that sparkling to me, and Obama does not appear comparatively weak.