For those who use lenses without profiles, Adobe Labs offers a separate app, Adobe Lens Profile Creator, which you can use to make your profiles. Unfortunately, if you’ve got one of the new Micro 4/3 cameras, like Panasonic’s slick GF1, you’re basically screwed, there is currently no way to create a profile for Micro 4/3 cameras.
Gah. The one case I’d have used the feature for.