There are a million ways to share big files with friends and customers.
I tried one recently that really hit the mark for me drop.io. It was easy to set up, had clear privacy guidelines and has useful administrative features. Try it out, it is a little different from dropbox since it is geared towards creating a web page where a user can download and optionally upload files. It also seems to have a pay capability which allows the user to be charged for the d/l of the files. Say if I was a band who posted items on the road for a small subscription fee, drop.io could manage the whole thing complete with comments, RSS feeds and all the usual goodies. Anyway, check it out if you need to share sometimes and sending the file in email just doesn’t cut it.
I almost forgot, you can send it files by email and add a voicemail for voice annotation. It’s just cool.