This is great stuff. I'm in awe.
I tested v0.0.8 2012-11-15 A8 with NEON on my Nexus 7 (A9 with NEON). All of the files in your download zip work fine, except as follows. (I'm reporting this here rather than on the form so I can provide more details, and so you can seek clarification. Hope that's okay!)
HTC_make_it_mine.wmv: No video when hardware acceleration enabled; video fine with no HW accel. Audio fine.
in_to_tree_720p25_3000.mp4: Frequent internittent horizontal white(?) lines across video, ONLY when in portrait mode. Happens with and without HW accel. I tried to get a screenshot, but they never seem to show the lines, which makes me think it's not a decoding error but maybe a timing error (buffering/refresh), or maybe the Nexus just ain't fast enough. I could try to video the screen using a camera if that would help.
Recital_24bit.flac: No audio or video, and play segued straight into vlc-player.mp4 on completion. In this situation, vlc-player.mp4 showed no video but played audio.
vlc-player.mp4: Same as HTC_make_it_mine.wmv.
Audio files (eg, Mr_Zebra.mp3) don't stop when pressing BACK arrow to go to file list. I assume this is by design, although I find it rather disconcerting.
If I can help further, please ask.