Not to be pedantic, but their main page has
86 HTML errors, and they're not declaring their DOCTYPE properly.
One step towards making sure content works on all devices, including handhelds, is making sure your content adheres to the standards.
For example,
every single page on the
Plucker site is 100% validated and works great on all kinds of handhelds.
I think its our duty as "Mobile Mentors", to ensure that sites continue to progress forward by pushing the envelope with projects like this, but also that they adhere to the standards that make our jobs easier.