Puzzle: Sharing files online

Hello readers, may I invite you to help me out with two file sharing puzzles:
First is sharing humongous files;
Second is tracking downloads

First: Share 10Mb, 20Mb video files

I have two video files from our AIM class and I need to share them to our classmates who are now back in their home countries around Asia. The files are large (10 Mb and 20Mb each) and couldn't be sent to most regular e-mail addresses.

I got a few tips from visitors to my article on Audio Blogs. I've tried ripway.com but there's a limit to file size. I've tried yousendit.com too, but it has it's file size limits too but my file couldn't get through. (The theoretical maximum size we could send via yousendit.com is 1Gb.) I tried my old trick of "uploading" the files on a Gmail account. Hirap. It didn't get through.

Can you recommend an online service that can accommodate my big needs?

Second: Share files, track downloads

Here's another thing I want to do (different from the previous puzzle). This time around, the files I want to share are small enough, around 600Kb. But what I want is to be able to track download information.

In other words, I want to know who are downloading the files. I'd like to have a way for people to (optionally) register their contact info before downloading the files.

Because registration is optional, at the very least I want to know how many times each file is downloaded. A bonus would be the geographic location or IP address of the persons downloading the file.

Is there an online service that can do this for me? One that is hassle-free. Any suggestions?

Read: Audio Blogs

TIA
Edong
TIA = Thanks in advance, not "Tita"