Webmail for storage

They guy actually scans important docs and sends them to himself.

E-mail addresses that convert file formats

Pdf's to and from other document formats and wav's to and from mp3's.

PipeBytes -- send files of unlimited size

Must keep browser open.

HFS -- HTTP file server

From lifehacker:

All you have to do is run the application on the computer with files you want to share, then selectively pick files or directories you want to allow access to. In addition, you can even upload files to your HFS server from elsewhere. You'll need to set up port forwarding for port 80 on the computer running HFS and then either remember your public IP address (which may change) or assign a name to your home server (for free)...

Stixy -- free-form collaboration and file sharing spaces

"A desktop-like space in the browser where you can upload and share files." However, quite free-form interface:

For example, photo files are displayed as small versions of themselves and sticky notes can be stuck anywhere. Therefore, Stixy is less like a traditional operating system desktop and more like a bulletin board.

Send 2 GB easily with TransferBigFiles

You send a link that stays live for at least 5 days.

Wired on how to share files on usenet

Supposedly the barrier to entry is a lot lower.