We should be wary of "giving" anyone more importance than they deserve. Chalabi should prove his following in Iraq, just like everyone else. Democratically.
I just don't know enough about this guy to have an opinion. But he's obviously an Iraqi with some stroke internationally.
Anyone like that should be put on some sort of postwar committee for their input, I think.
The reports that he's favored by the DOD, but not the State Dept add even more credence to that assertion. If he's someone Americans differ about, he's probably relevant.