It's safe to say that email has become most people's default mode of communication these days. It's easy to use and usually faster then dialing a phone number. Unfortunately, email still falls short when it comes to sharing media.
The other day I received a series of photos from a client that totalled over 8MB. It took over 2 minutes to download the photos to my inbox and the network performance at the office was noticably slower during that time period.
For this reason, I recommend services like YouSendIt which let users send large files through their website. It's easy to use, just type in the recipient's email address (or multiple addresses) and upload your file. That's all there is too it, and nobody's email server has to suffer.
What's even better, YouSendIt offers a free Outlook plugin which makes it convenient to send large email attachments right from Outlook.