Got this offer in my email a few days ago:
Stay 1 Night ---> 1,000 bonus Starpoints
Stay 2 Nights --> 2,500 bonus Starpoints
Stay 3 Nights --> 5,000 bonus Starpoints


Terms & Conditions for Offer

* Bonus Starpoints are awarded per eligible reservation that results in a paid stay on a Starpoint eligible rate plan at a participating hotel during the promotion period between 10/21/02 and 1/31/03.
* A stay is defined as one or more consecutive nights consumed in the same hotel or resort regardless of the number of check-ins or checkouts that occur.
* In receiving this offer, you have been pre-registered to participate.
* To be eligible, you must be pre-registered for this promotion, be an active member of Starwood Preferred Guest® at time of reservation and provide your Starwood Preferred Guest membership number when making reservations and at check-in.
* There is only one bonus per stay, per member irrespective of the number of rooms booked or number of individual reservations.
* Promotion is limited to a maximum of 25,000 bonus Starpoints.
* Bonus Starpoints will be posted within 30 days of the eligible stay posting.
* Not to be combined with other offers or promotions.
* Standard terms and conditions of the Starwood Preferred Guest program apply.
* See www.spg.com for program terms and conditions.
* Not responsible for omissions or typographical errors.


It appears that I have been pre-registered to particpate...so I don't know if anyone can just sign up for this.