...the unit will not recognize and/or play most of my video files such as .avi, .mkv, .wmv, etc. Do i need to wait for the "official" launch of the USB channel in the Roku Channel Store...
If you wait for the official USB channel you're likely to be disappointed. These are the only file types they've announced USB support for:
* USB 2.0 port (enabled via free software upgrade expected Dec 2010). Video support: MP4, M4V (H.264). Audio support: MP3, AAC, M4A. Image support: JPG, PNG
No, I don't work for Roku.
Netflix Player N1000X, XDS 2100X (premature death by lightning)
Roku2 XD 3050X, Roku2 XS 3100R, Roku2 4210R