Invitations for Worlds 2008 have finally been sent out to players with a high enough ranking. Be sure to check your e-mail! This is how the beginning of the invitation reads:
Dear POP member,
You are receiving this email because we have pulled the final results from your ratings zone. We are pleased to inform you that you have earned an invitation to participate in the 2008 Pokémon TCG World Championships in Orlando, Florida from August 15th through August 17th 2008.
If you do not have an invitation to play in the main Worlds tournament, you can still receive one by making it through the Grinder tournament held at Worlds one day before its main events. More information on these events can be found at the official Pokemon Organized Play website.