From ESPN Insider:

Luol Deng, Chicago Bulls. There's no question the Bulls love him, but they're also desperate for size if they want to make a serious run this season. As of now, they'll have more cap room than anyone next summer, but the best available free agent big man might be Nazr Mohammed (depending on what happens with Ben Wallace).
If they move Deng, they'll get value -- and perhaps a better big man than what'll be available next summer. There won't be any room for Deng next season if Peja Stojakovic and Andres Nocioni are the small forwards.

So, let me get this straight.  This rumor is contingent on the Bulls signing Peja next year, right?  I think that rumor would only come through if Deng were traded, but I don't see it happenning.  Paxson has yet to move a young, cheap piece for an old, expensive piece and I don't think he's going to rush into something now.  This writer is clearly overlooking Sweets's contribution.  I think the biggest tip-off is the "serious run this season" comment.  Pax has said several times they're waiting to use their cap space until next season.

Honestly, I'd much rather the Bulls moved Gordon than Deng.  I think Gordon's trade value is probably greater than his actual value at this point, and Deng is probably a better building block.

Of course, this guy also claims the Wolves are gonna trade KG and Wally to the Knicks for AD and Penny.