My 2 Cents:  When this device first came out a couple of people asked me what I thought and from start I knew that it was not going to fulfill the needs of most people because of its total dependency on iTunes.  Now it seems that there is a reason to get it…with this new application it really opens up a world of options…sucks that you have to buy it ;O( but at lease it does not void the warranty…

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…

Engineering souls have been hacking up the Apple TV for a good while now, but those too scared of completely ruining their box have had to sit patiently on the sidelines waiting for someone else to do their dirty work. Enter aTV Flash, a USB flash drive which enables your Apple TV (Take 2 included) to do all sorts of fancy new tricks without any fuss. Those with the drive simply plug it in and watch as new file formats become supported, UPnP media streaming opens up and Safari-based web browsing becomes a reality (among other things). Granted, the convenience will cost you $59.95, but that’s the price you pay for making your life easier (and your Apple TV a little more useful).

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aTV Flash goes commercial: plug-and-play hacks for your Apple TV – Engadget