Radeon vs. RadeonHD Fighting Continues
Of course, this led to Luc Verhaegen (one of the RadeonHD developers at Novell) bringing this up on the X.Org mailing list. Luc doesn't see shipping two drivers for the same hardware is a problem, but some other developers see that as a support issue. Throw in differing views on RandR 1.2 and other features, and you have a good old argument and flaming among X.Org developers.
View this thread to read the latest on the Radeon vs. RadeonHD fighting among Luc, Daniel, Keith Packard, and others.