I had a chance to review the cute little Micro Muff from Micromuff.com. Its a great idea for those using the built in microphone on the AGC enabled DSLRs outdoors.
Do they work? Pretty much yeah. I tested it in from of a fan blasting the camera on high. You can hear there is still some flutter noise, but this was an extreme test. Watch this video to see a more realistic world test: vimeo.com/18875991