Update: The speculation posted was probably partially wrong (mostly pricing)...

These are still a possibility:

15" 1.0GHz, up to 2GB RAM, 64MB VRAM

15" 1.25GHz, up to 2GB RAM, 64MB VRAM

All three (12, 15, 17) models will be updated.

Addendum: Based on some final whispers... the previous "software announcement" rumor was actually supposed to read "hardware announcement"....