In Google Docs, you can email the word documents, but you can not email the Excel files. It would be great if they allowed you to package excel files into PDF format and then email them like the word documents.
Also, when you email a document, there should be a place that keeps track of your email history.
I am a big fan of Google documents and I use it for everything. I find it weird when people get all scared because they think Google will violate their privacy etc… etc… Sure it is a legitimate concern, but honestly, I would sacrifice that for the convenience it has brought me.
If you don’t know about Google docs, try it out. Its a great way to free yourself from carrying a usb stick, or if you are like me, emailing documents to yourself.