The light side and the dark side are battling for honors in the race to become America's favorite Star Wars stamp.

After two weeks of voting, Yoda is in the lead -- but Darth Vader is menacingly lurking close by. And to ensure that Star Wars fans have every opportunity to vote, the United States Postal Service has made the process of voting online at www.uspsjedimaster.com even easier.

Instead of waiting for a confirmation email, once a fan has entered his or her e-mail address, the vote is cast -- it's that simple. The site has even added an option to receive a reminder to vote the next day.

Since its launch, the votes have been pouring in at www.uspsjedimaster.com, and will continue through May 23. Will Yoda's lead hold? Will he succumb to the dark side? Will the Emperor emerge victorious? The world will find out the results on Friday, May 25, when the winning stamp will be announced at the first-day-of-issue ceremony of the Star Wars stamp sheet during Star Wars Celebration IV in Los Angeles. The stamp receiving the most votes will be honored with the issuance of a single stamp, which will be for sale later this summer.

Check www.uspsjedimaster.com for regular updates on voting -- it's up to America to choose which Star Wars stamp wins the honor of a single-stamp sheet release.

Pre-order the Star Wars stamp sheet

The set of 15 stamps will be released at a first-day-of-issue ceremony on Friday, May 25, at Star Wars Celebration IV, the biggest Star Wars event in the galaxy, at the Los Angeles Convention Center. The stamps will be available for purchase on May 25 in Post Offices, on www.usps.com, and by calling 1-800-STAMP-24.

Customers may pre-order these stamps for $6.15 starting April 25 (which is 30-days in advance of May 25), by going to www.usps.com or by calling 1-800-STAMP-24. For those outside the U.S., same options apply. Your Postal Administration will deliver them as any other delivery from the U.S. All Star Wars stamps preorders will be shipped on May 25.

Stay tuned and visit www.uspsjedimaster.com for more information and to vote on your favorite stamp!

Pre-order the Star Wars pre-paid Express Mail envelopes

This set includes three pre-paid Express Mail envelopes featuring artwork images of Yoda, Darth Vader, and Obi-Wan Kenobi as well as the new Marine One Express Mail stamp. The set of three envelopes cost $48.75 and will be available only from May 6 through Sept. 1. Customers may pre-order the envelope set now at www.usps.com, by telephone at 1-800-STAMP-24, and in the quarterly USA Philatelic catalog. They are not available in Post Offices.

Become a Jedi Shipping and Mailing Master to Win a Trip Through May 7, customers can enter this sweepstakes by solving six different challenges about Postal Service products and services featuring a Star Wars theme. As each question is answered correctly, customers are automatically moved to the next challenge. At the start of the sweepstakes, customers enter their contact information into a sweepstakes form. There is a limit of one entry per challenge, for a total of six entries.

The Jedi Shipping and Mailing Master challenge is a fun, interactive Web tool that reminds customers of the quick, easy and convenient suite of services available from the Postal Service, including ZIP Code Lookup, International Shipping, Flat Rate Boxes, Click-N-Ship, Priority Mail and Free Package Pickup. The winner of this sweepstakes will receive an all-expenses-paid trip for four to the 30th Anniversary Star Wars Celebration IV in Los Angeles, which runs from May 24 to May 27. For details, click here.

(Note: To obtain a downloadable 300 dpi image of these stamps visit the 2007 Commemorative Stamp Program release link here. For a free downloadable papercraft R2-D2 mailbox, visit the Star Wars Kids site here.)