Just got off the phone with my guide. I put a call into her this afternoon, she just called back. Scoop on BLT is for add ons it's 100 point minimum at 112 per point, less 5 per point which can be applied to the required 10% downpayment. Also offering 100 developer points that must be used by 10/1/09 and can only be used at SSR, or California or trade out.
Just thought I'd share...