I was reading a story on tuaw.com about a guy who tracked down his lost iPhone using the new service Find My iPhone. In the post, the iPhone owner wished he could have logged into the the me.com Accounts page and used the service from a friend's iPhone to help track the movements of his lost iPhone, rather than lug a laptop around.
In fact, you can login to the me.com site via the iPhone/iPod touch, but you need an app that uses its own web browser rather than the Safari.app that is on the device. I have done this with an app called iStorage, which uses it own browser rather than switching to Safari.app. It looks like you can also use the browser in IM+ lite 3.0, which is free.
I tested the Find My iPhone feature from my iPod touch, and it worked. It displayed where my iPod touch was at that moment, and I was also able to send a message to it with the alert sound. It was slow, though -- very slow. And I suspect that's why Apple has a redirect when trying to login to me.com from the iPhone/iPod touch. But if needs must...
I don't see why Apple couldn't enable the Find My iPhone page to work as a simple webpage when using an iPhone/iPod touch -- it just needs the map and send message and remote wipe buttons. Until they decide to do this, though, this workaround is a viable solution.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20090622131953462