YouSendIt
I've been waiting for years for this service:
"Choose who you want to send a file to. It can be anyone with an email address. You can specify multiple email addresses separated by commas. Select a file to send. You can send photos, audio, documents or anything else. Your file will be stored by YouSendIt without ever filling up your recipient's mailbox. YouSendIt will automatically email your recipient a link to your file stored on our server. Your file will be deleted after seven days.No passwords to share, no software to install, no accounts to create, and no full mailboxes." link
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