Here's an updated article discussing the impacts of mortgage credit availability with conventional loans: http://finance.yahoo.com/news/mortgage-credit-declines-ahead-qualified-154412865.html
Some important points
Expect conventional loan DTI requirements to drop to 43% for most borrowers
Those wishing to exceed 43% will be looking at 70% LTV or less
Points and fee caps of 3% (is this including rate buy downs and LPMI too??)
I believe the conforming limits are expected to be lowered too January 1st but I haven't been able to find a specific amount yet. This all seems counterproductive considering where the market is headed, so hold on tight. It's going to be a bumpy ride.