Fed up with email messages bouncing because your attachments are too big? There's a simple solution -- get a very good new Firefox add-in, AllPeers .
It's a simple peer-to-peer file-sharing app. Set it up, select files you want to share, and who you want to share them with, and the person gets a notification. He can then grab them. It's that simple.
For the moment, AllPeers runs only under Firefox, but expect it to work with Internet Explorer some time in the future. If you've ever had a problem with sending a file via email, it's worth a look..!