Im with DJ on this one. Im currently finishing off my basement and didnt even thing of putting anything but normal can lights in. I only use cfls if the room is not on dimmers as well. The upfront costs I feel will not be recouped, and more so they dont have LEDs, and CFLs perfected.
Once they do have them perfected their will be retro fits to fit your existing can (they already do but I hear nothing great about em)
I've just been told about the retrofit, but didn't know if they worked as well or are dependable. Would have to be hardwired into standard cans to be to code here.