You can sign up for Starwood at the link on the right. Once you’ve done that, and if you’re going to be travelling soon, sign up for a 3 month CLEAR membership for free by simply entering in your Starwood number.

It will be set to auto-renew, by once you get approved, you can turn it off. In the fine print it says “Your Clear Account is set by default to auto-renew. You can turn off auto-renew at any time by logging into your Clear account at flyclear.com/myaccount and changing the autorenewal setting in “My Profile”.”
Here are the airports where CLEAR is set up so you can bypass security.
Here are the full terms and conditions.
SPG® has partnered with Clear® to provide you with this complimentary three-month trial membership in their convenient “fast pass through airport security” service.

Now you can experience two new options designed to simplify your air travel. 1. SPG Flights (SPG.com/flights) takes the restrictions out of airline redemption, allowing you to redeem Starpoints to fly on more than 350 airlines — all with no blackout dates. 2. Clear® offers travelers a fast and secure way to bypass long security lines at many major airports.

This complimentary three-month Clear® trial membership offer expires February 28, 2009. You can cancel anytime during the three-month trial, but if you’re pleased you’ll be renewed automatically for a one-year membership at $199. To learn more about Clear®, please visit www.flyclear.com.