We probably aren't getting anything back of this level anyway, but Hobson is potentially a much better fit than CDR.
I wouldn't be terribly surprised if we did get something reasonable back. After all, we did make the qualifying offer to Brockman, and the Bucks can't force our hand if we don't want them to. We're clearly willing to hold on to Brockman for about $900K, it's not like we're trying to dump his salary, so I don't see why we'd give him away for nothing.
As far as Hobson goes, there are at least a few reasons why it would be reasonable to assume that Milwaukee would let him go. They are a bit full-up at the 1/2/3 - Maggette and Delfino will probably play most of the 3, Salmons and CDR will probably take most of the 2, and Jennings will cover the 1. They'll probably want a backup point to spell Jennings, but I don't think that's Hobson. In addition, they've apparently yet to sign him, so they could simply trade his rights with no recently-signed-player trade delays like we had with Donte.