John Hull, Dell Manager of Linux OS Technologies gives an overview of what customers can expect from our initial Ubuntu offering.
Read it here
Software and Hardware Not Offered
For hardware options not offered with this release, we are working with the vendors of those devices to improve the maturity and stability of their associated Linux drivers. While this may not happen overnight, we do expect to have a broader range of hardware support with Linux over time.
At this time, we are not including any support for proprietary audio or video codecs that are not already distributed with Ubuntu 7.04. These include MPEG 1/2/3/4, WMA, WMV, DVD, Quicktime, etc. We are evaluating options for providing this support in the future.