Laurie, sorry for the delay. I just saw this. They just re-designed the site and I wasn't aware that customers could also volunteer. In the beginning, it was only for partners. Again, I apologize.
I have given a list of volunteers to Disney based on the volunteers listed on the project page. You should be able to let them know that you are with Starbucks and they will have you sign a volunteer waiver. It's usually pretty hot out so we encourage everyone to wear shorts and tennis shoes (a shirt is provided).
We have done this for 4 years and we get out there at 4:30 a.m. to serve breakfast to the volunteers. For the other volunteers that don't want to come out that early, they usually arrive at around 7 a.m.
If you need further information, please contact me at Starbucks Howell Branch: 407-672-0273. Thanks, Kelly
