File Retrival Off of iDisk via internet w/windows PC

This is one of the features that made me buy .mac. In class I saw a girl load a powerpoint presentation directly off her idisk via a web browser, no apps. I saw the apps to do so, but is there a completly web based way?

If you mean can you access your iDisk from a PC the answer is yes absolutely. You don't even need to mount the iDisk, you can park a file in your iDisk Public folder and access it from any web browser on any computer:
http://idisk.mac.com/(DotMacUserName)-Public