I know the 3870X2 isn't officially supported and XOrg provides drivers that offer only partial support.
I've been waiting for almost a year to get some drivers that can take full advantage of the card. Plus, the card was expensive enough so I don't want to discard it and grab another one. Supported.
I don't understand why all other cards are supported (even the 48XX X2 series), but not the 3870X2.
Do you, at least, plan to support it?