If you're not looking for actual HTPC functionality then the Western Digital HDTV Live will work for that. Plus the latest does Netflix if that interests you.
It supports:
Video - AVI (Xvid, AVC, MPEG1/2/4), MPG/MPEG, VOB, MKV (h.264, x.264, AVC, MPEG1/2/4, VC-1), TS/TP/M2T (MPEG1/2/4, AVC, VC-1), MP4/MOV (MPEG4, h.264), M2TS, WMV9
Photo - JPEG, GIF, TIF/TIFF, BMP, PNG
Audio - MP3, WAV/PCM/LPCM, WMA, AAC, FLAC, MKA, AIF/AIFF, OGG, Dolby Digital, DTS
Playlist - PLS, M3U, WPL
Subtitle - SRT, ASS, SSA, SUB, SMI
Congo