on awkwardtv wiki site, they say
Name Extension Works? Codec Notes
"Matroska .mkv, .mka Yes MatroskaQT, Perian SVN, Reportedly not very usable"
it is not very usable because is NOT runing optimizied code, like Perian 1.0, or the fact of low computer power of aTV? I am trying to make the choice between aTv and MAC mini for my HTPC. Anyone has the experience please let me know