Usenet would be fantastic. I got excited when I saw this news, but then I find out that it hasn't actually been implemented. Usenet allows people to download any files, any time, at maximum speed, simply by typing in a search and clicking the mouse a few times. There is no bullshit rapidshare waiting period or advertising. You can use whatever client you wish.
I use Supernews, at a rate of $9 per month (and I am probably overpaying). It has the maximum retention of any server (~4 years), it supports 30 simultaneous connections, no caps, and unlimited download speed. I download files with my cable connection at a rate of 3MB per second.
As it is now, and even before on Megaupload, downloading files took forever. I had to click through two or three web pages to get the link, then click download, wait 30 seconds on a page full of ads, then wait for the file to complete since they only allowed one download at a time. With usenet, I could theoretically locate and download the entire set of Nintendo Power in the time it took me to get one file the old way!