Sirius CEO Mel Karmazin will participate in a keynote discussion at the 2007 Lehman Brothers Worldwide Wireless and Wireline Conference at the Crowne Plaza Times Square in New York City.

The keynote will be at approximately 4:30pm ET, tomorrow, May 31st. A webcast of the keynote discussion will be available here.

Sirius' Raw Dog channel (ch 104) is covering the "Star Wars Celebration IV" at the Los Angeles Convention Center, which started today (May 24th) at 12-noon ET and will continue through Tuesday, May 29th.

Star Wars Celebration IV is the biggest Star Wars party ever.  Thirty years ago, Star Wars opened in theaters and took audiences on a groundbreaking journey to a galaxy far, far away. It instantly seized the public's imagination, and three decades later still claims that grasp. The event brings the best of the Star Wars universe together in one place for a weekend that’s designed by fans for fans.

Coverage begins with reports from today’s "fan club only" events and includes a full weekend of reports that will include droid building, costume contests, Jedi training, the “Stormtrooper Olympics” and sneak peeks at the all-Star Wars episodes of Family Guy and Robot Chicken.

Sirius is also staging a final battle between Darth Vader and Yoda for the best two characters as voted by fans in Sirius’ "Duel of Fates." The winner will be announced at 12 noon ET on Tuesday.

Sirius Satellite Radio is celebrating Mothers Day with a special weekend broadcast event: Radio Mom. Starting on Friday, May 11th and running throughout the weekend, Sirius is transforming channel 119 into the only radio channel dedicated to moms, moms-to-be, and inspirational mother-like figures for Mothers Day.

Radio Mom will broadcast reflections, memories and special shout-outs dedicated to mothers of all kinds from Deepak Chopra, Richard Simmons, Jane Pratt, Jim Breuer, and other celebrity callers and listeners. You'll also hear favorite songs celebrating these special women during the holiday weekend.

Martha Stewart will also be sharing personal memories about her mother, Martha (affectionately known as "Big Martha"), as well as reading "The Lanyard," by Billy Collins, a poem she cherishes. This special segment will also air on Martha’s channel, Martha Stewart Living Radio (ch 112).

If you want to share personal reflections, memories, and dedications to salute your mom, just dial 877-33-SIRIUS and press 4 to leave your own special message. Mom will love ya for it.