TechnologyReview.com - Housing Bubble:

Didier Sornette's and Wei-Xing Zhou's analysis differs from just two years ago, when there was no sign of the faster-than-exponential growth characteristic of a bubble. Their conclusions are strengthened by their successful prediction of a housing bubble in the United Kingdom in 2003, where housing prices began dropping in July 2004. Their analysis is nifty, and the mathematics are simple and straightforward. "Soon" might be a good time to sell.

I'm planning to read Zhou's and Sornette's Is There a Real-Estate Bubble in the US?. I'm really scared to buy a house right now -- but it's also scary not to!