Per Starwood Lurker on FlyerTalk, Starwood is throwing a bit of a bone to high volume Platinum members. From October 1 through December 31, every night a Platinum member stays beyond the minimum requalifying threshold (25 stays or 50 nights) will earn quadruple Starpoints. Registration is required, and you only start earning the quadruple points after you register.
Given that this is combinable, it can actually be quite lucrative. Assuming you have a Starwood American Express and stay enough to fully take advantage of the “Every Night Counts” promotion, you could be looking at about 10 points per dollar spent.