Sent off my forms to marshall again this year at the TT. If you are visiting the TT (or the Manx or Southern100) why don't you volunteer too? You will be made very welcome, become part of something very special, and learn new skills.
You can contact the IOM Marshalls online, or just go to the hut at the back of the Grandstand when you get there.

The website is <A HREF="http://www.iomttma.com">www.iomttma.com</A>, and the email address is <A HREF="mailto:iomttma@manx.net">iomttma@manx.net</A>