Yeah, that question will rule a lot of you out, but for those it doesn't this should be something of a rare delight. If you've got a copy of Vista Premium, and install the vmcNetflix plug-in, you'll be able to rent streaming movies from Netflix (currently only available to Windows PCs) and - with a little jiggering - beam them over to your 360. It's apparently a little buggy, but hey, in the absence of an official deal, it's as good as you're going to get it for the moment.
vmcNetFlix [vmcNetFlix, via Gizmodo]