I don't think they'll give up Webster and, as RJ87 points out, it's kind of pointless to trade Juwan Howard for short-term big man help, but they'd definitely be interested in Big Baby.
He'd give them someone to body up 5s in the short-term, as well as a guy to provide depth at the 4 once Oden/Pryzbilla return.
I'd love to pry Steve Blake off that team. He's a much better short-term option than DJ Augustin, given his size, experience, and playmaking ability.
He also seems like a luxury on that Portland team. They have Miller, Roy, Bayless and Rudy Fernandez as sexier options in that backcourt. House wouldn't be bad as a 5th guard for them.
House/Baby for Blake/Mills/Pendergraph works on the trade machine.