Here's a quick article on the current state of iPhone unlocking. It's apparently still a somewhat ungainly process, though doable by anyone willing to take the time to fully digest directions for the deal.
I suspect that over the next month or so (perhaps 6 weeks) we ill see truly user-friendly software appear for doing this. The fear factor is already fairly low. A "bricked" iPhone can be recovered without a trip to Apple for which one would undoubtedly be charged and the process is no worse than the one for unlocking.
While I doubt I will get an opportunity, I'd love to give this one a whirl myself.