Pretty much as the title says, using bootcamp.
WDDM1.1 compliance and GPU recognition confirmed by the WP7 emulator running with EnableFrameRateCounters showing.
I'm considering a Macbook air as a compromise to resolve a need to access iphone dev tools and upgrade my Win7 mobile capability to something reasonably performant with one device.
My current laptop barely runs Win7 and borders on unusable for WP7 tooling hence the interest to try and solve two problems with one device - if realistic.
I assume if the device can run WP7 tools satisfactorily, it would be capable of anything else I might want to do when booted under Win7.
The new MacBook Airs do not have very powerful processors. The 11" maxes at 1.66 Ghz, while the 13" maxes at 2.13 Ghz. However, they do have the same GPU as the current 13" MacBook Pro. Also, since they use solid state drives, data access is significantly faster. Overall, it will not be the fastest computer you've used, but it should be enough to work.