I'm sure other people did also, but Kevin at Cryptogon called it on January 2nd of this year in his predictions for '08:
"The ARM (Adjustable Rate Mortgage) resets don’t peak until March 2008. My guess is that homeowners with these loan products will wind up in very dire situations within six months of the reset. That puts the crescendo of the economic crisis in September 2008. "
Cryptogon and the RI board are, in all seriousness, two of my major news sources...