I only have the information on the Japanese blog to go on right now but I have a picture of the entrance to the event itself taken by WCS staff member Issoh:

As far as I know the WCS preliminaries will be held on Saturday. Here is a picture of Renee from USA 2008 along with Yui and Mino from the Osaka 2008 team. Yui and Mino were invited out to perform during the cosplay stage event.

They were so excited to be going to the States, I am sure they will have a great time and put on a good show for everyone. They have a cosplay radio show in Osaka actually and are great performers. I hope to get some information for you on their experience!