These aren’t really my contributions, but it’s worth noting that there are quite a few known issues with Edgy in its current form. Some of them are considerable — such as video card detection or wireless dropouts.
https://wiki.ubuntu.com/EdgyKnownIssues
http://www.ubuntuforums.org/showthread.php?t=283364
Depending on the hardware, there might be some solutions there.
