Essentially it seems to be something in the works. When AlienWare was asked about the deal, they said "No comment". Dell is being a bit more tight-lipped about it and trying to dispel rumors.
It's not something terribly far fetched:
-Dell has been hinting for a while now, that they want to start using AMD processors (in addition to Intel).
-Their XPS gaming line isn't competing well with high performance and price ratios.
I think it would be a good move for both companies; from a business standpoint.