Anything that you like, inparticular?
Health care plan, tax reform both have some substance to it. Health care plan has a good chance of working. Tax reform is progressive, and certainly fairer, but he's probably overestimated the savings (in fairness, every politician who's ever lived has done this, and to a greater degree).
Getting out of Iraq to focus on Afghanistan is a good one, although there's more detail on getting out of Iraq than what's to be done in Afghanistan.
Climate change / energy policy is ok - good stuff on carbon trading schemes (so does McCain), objected to some silly things (gas tax holiday) but accepted others (cracking down on speculation).
Immigration policy is realistic and compassionate. I wish he'd lay out more detail on how clarifying the status of current illegals though. In fairness to McCain he's also got some good ideas here. I also wish that the British political parties would take a good look at both candidates' ideas and learn from them, rather than go through their slightly xenophobic, nanny state, ham-fisted route of pandering to popular prejudices.
Where he really falls down is opposition to free trade. McCain beats the shit out of him on this (or used to, anyway). The funny thing is that his economic advisors are much smarter than this, and hopefully it's only a populist position to be reversed if he wins.
Oh, and I don't like his support for faith-based initiatives, although it's your country, you're a lot more religious than the rest of the world, so it floats your boat.
I don't vote in the US, so I won't bother saying which candidate I'd vote for, but I substantively agree with Obama on several more issues than I do with McCain. Having said that, McCain has some pretty good ideas that Obama would do well to adopt if he gets elected.