I found out today while browsing on my Blackberry that this website shows up remarkably well on my mobile browser.
A lot of sites don't come out looking so great - especially those with heavy graphical content, Javascript, or code that's not optimized for accessibility. I was surprised that Drupal, with it's high degree of customizability, actually translates very well to more simple web browsers.
By the way, don't ask why I have a Blackberry. I plan to switch over to an iPhone ASAP...