I just discovered YouSendIt earlier today -- I wish I'd known about it yesterday, when I made my laptop spend hours shoving a 70MB archive up through a slow SMTP connection, emailing it piece-by-piece to a friend.

YouSendIt aims to make email transfers of large files easy. While almost all mail services cap individual attachment sizes at 5 megabytes or less, YSI lets users send chunks of data up to 1 gigabyte at a time. Go to their site, specify a destination address and upload the file using a simple web form. The recipient will get an email containing a link that'll allow them to download the attachment from YouSendIt's servers. Simple.

What's not so clear is how YouSendIt intends to make any money off of this little scheme. For that reason I'll be sure I use the just-mentioned SpamGourmet whenever I utilize YouSendIt's service. If the recipient doesn't have a SG account you can always send the email to your own, then communicate the YSI link to your buddy through a private email. Zipping up your files into a password-protected archive probably isn't a bad idea, either. It's not exactly a secure solution, but it should at least be enough to keep YouSendIt from automatically poking through your files for who-knows-what.