Time.com has this article that begins as follows:
The commercial real estate market seems headed for trouble, the next potential victim of the speculative frenzy that has already devastated the residential housing market. That prospect apparently hasn't scared investors. Shares of real estate investment trusts (REITs, which buy and manage buildings and mortgages) have been on a tear for the past seven months, almost doubling in value on average. REITs now trade at a double-digit premium to the value of their underlying properties.
The story ends with this quote: "The vultures are circling, waiting for commercial real estate corpses."