While I think the beer launcher created by a Duke University engineering student is well-designed and pretty cool, I have to assume the final product will be a little more attractive. This thing wouldn't look appropriate anywhere but in a Duke University engineering student's dorm.
Also, I think he might want to add a laser site to it since though it may be accurate once it's aimed properly, the trial and error required for aiming it might get messy and, potentially kill a pet. Watch it in action here:
Unrelated to the beer launcher, perhaps I just hadn't noticed, but Metacafe inserts two ad links after a video ends. I think that's a good strategy, but A) the links should be relevant to the video just played b) if they don't already, they should offer the video producer ad space there, and c) they should include space for the "Replay Video" link within the video space as well as "Related Videos."
I also think it's a great idea to show how much the video producer has earned by posting their video. What a great incentive to get others to post quality content instead of the stupid crap.