I just thought I'd highlight another site that I've been using quite a bit lately. It's called YouSendIt.com. It gives you the ability to "email" very large files that wouldn't normally fit in an email. Most people's email has a maximum attachment size of 20 MB or so. If you need to send someone a file bigger than that, then YouSendIt will allow you to upload the file to their site and will send an email to the recipient with a link to download it.
A basic account is free and lets you send files up to 100 MB in size. The download link will be available to the recipient for one week. Paid accounts let you send even bigger files and you can store them longer and there are some other added features. But 100 MB is enough for pretty large audio and video files so the free account has worked well for me.