Planet Blue, a commercial post house in Santa Monica has created a site called TheSpecSpot where anyone can rate and add their Spec commercial work. The purpose of the site is to lend a helping hand to new, and no-so-new commercial directors to get exposure and feedback from the likes of you adgrunts. You can browse all the current films and rate them on creative idea as well as execution, they range from the sublime to outrageous. All films are in QT.
It's not the only experiment, they're also working on retooling Hyperchannel, a widget that puts video content directly on your desktop to be more of a "broadcasting for the masses" technology, where a trusted content source (a video-blogger) could put content on their Hyperchannel, and have it delivered to all who subscribe to their hyperchannel. Right now this toy is in Windows only but you can expect a Mac version sometime in September.
update: The comments below recommend you to take a gander at these films. (make a comment to share you fave or least fave!)