[link] TransferBigFiles.com

TransferBigFiles.com makes it easy to send files that are way to big for e-mail - up to 1GB. You upload the file(s) via their website and enter the recipient's e-mail (and some optional things, like a password). The recipient gets an e-mail with a download link and has five days to pick it up. It's a free service from the good folks at Axosoft.

I've used Dropload for this kind of thing before, but their limit is 100MB. YouSendIT handles up to 1GB, but the guys behind TransferBigFiles said it's not reliable and pretty limited functionally.

Here's their post about how they put it together in 20 hours:
Just a Weekend Project! The Implementation of TransferBigFiles.com

They used Mediachase FileUploader.NET to handle the actual uploads. Looks like a good product to remember.