Copy to mobileme
Whilst Apple now allow you to send a link to a file to another user it requires the use of a web interface, I'm sure it will eventually be built into the Finder but until then this script helps to automate the process. The first part of the script asks you to select a file, the next part uses a shell script to compresses it to a zip file if it is not already zipped. It then gets the mobileme name and then copies the zipped file to the Public folder of your mobilme (.dot mac) account. The final part of the script creates the email that you need to send to the intended recipient.
You can read the details here, and download the script here. Add it to the Script Menu for easy access
The Script Menu can be added as a Menu Extra to allow easy access to many AppleScript scripts from the menu bar (Mac OS X ships with several scripts that are ready to use to accomplish some common tasks). You can also add your own scripts to this menu.
To enable the Script Menu, run AppleScript Utility (located at /Applications/AppleScript/AppleScript Utility) and check the "Show Script Menu in menu bar" checkbox.