This month I thought I'd check in about a relatively new wall framing technology called the Tstud. It's a thermally broken wall assembly to help reduce thermal bridging through the exterior and party walls. This provides for quieter, more comfortable living for your clients. I believe you can order through Tum-A-Lum and other lumber suppliers. You can order them without or with insulation already installed. They can be used as single top plates and headers, saving on lumber costs.
Here are a few links to learn more:
Working With Tstuds - GreenBuildingAdvisor
Tstud - Building Products, Inc. (bpi.build)