Hey, I bought an AppleTV 2 weeks ago and really only had time to play with it this weekend. I have heard on and off about MKV files and downloaded some movies lately and was amazed at the quality of the compression. I can't really tell the difference between MKV 720P vs Blu-Ray on my 720P television but after running it through VisualHub, there is a slight degradation. The sound suffered a lot and there is a softer look to MP4. Is it worth it to hack the ATV to handle MKV or are you guys for the most part content with MP4?