A few weeks ago, the OCC posted an Interagency Statement on Prudent Risk Management for Commercial Real Estate Lending.
The agencies seem to be noting increased concentrations and risk in commercial real estate lending activities. This probably does not come as a surprise to most of you. The bulletin includes a handy PDF document with explanations and additional references to regulatory guidance.
For your reference, the OCC also has a specific page for Commercial Real Estate, which includes additional links.