Mkay. I gave my thoughts on my favorite P2P software at the moment. Thanks to Zach for pointing out PodMailer!
So here is a little problem .... you think all P2P apps are the devil. Maybe your Grandma Birtha doesn't know squat about installing software or using sharing software. Perhaps your buddy that you want to share stuff with hates the flavor of P2P that you like. I have the solution for you! Check out Senduit!! It doesn't get any better than this in my opinion. It's clean in design, and is overall pretty fast. Now mind you, this isn't a storage site ... just a sharing site. Pick the file that you want to share with your buddies ... specify the length of time that you want it available for download ... upload it ... share the link ... all done! You get a nice brief link address, instead of some of the impossible ones that other sites provide. Try it and I think you'll like it.
If there is something better that I should know about, please post a comment! I've tried a ton, so it better be good.