If you get an Apple TV check this out
http://www.applecorellc.com/
aTV Flash - Ver. 3.0
Key Features:
- Play most video formats (DivX, Xvid, AVI, WMV, RMVB + more)
- Play DVD files WITHOUT converting them
- Sync, organize and watch non-iTunes video files
- Browse the web with a Safari based web browser
- Rent & watch Hi-Def movies from Jaman.com
- Stream media from UPnP(v1) media servers
- View local weather forecasts
- View RSS Feeds
- Enable SSH access
- All original Apple TV features remain intact
- And much, much more...
Supported Codecs:
# AVI, DivX, Xvid, and FLV
# MKV formats supported up to 480p resolution (hardware limited)
# MS-MPEG4 v1 & v2, DivX, 3ivX, H.264, FLV1, FSV1, VP6, H263I, VP3, HuffYUV, FFVHuff, MPEG1 & MPEG2 Video, Fraps, Windows Media Audio v1 & v2, Flash ADPCM, Xiph Vorbis (in Matroska), MPEG Layer II Audio
# AVI support for: AAC, AC3 Audio, H.264, MPEG4, and VBR MP3
# Subtitle support for SSA and SRT