What would really help Burke is if Pronger is traded. Say Pronger goes to Boston or New Jersey (both linked to him), and Bouwmeester is taken off the market. How valuable is Kaberle now? If New Jersey got Pronger, Boston would probably make a pitch for Kaberle, and Philly probably would too (especially if Jay-bo is not available since hes linked to Philly).
Bidding war like crazy. And if Burke doesn't get the offers hes looking for for Kaberle, I bet Kubina could still be moved for more than he's worth.