He pointed me out to the GMail Drive Shell Extension.
This piece of software magically turns your GMail account into a (network) drive! The drive will even show up in Window Explorer (hence, the name Shell Extension).
I tried it on my PC and after a 3 seconds installation I was copying files on this drive. I wonder how Google is going to react to this, as they probably did not expect that we would be really using the 1GB space!
Who is going to do a version that supports the 2GB MSN email?
[GMail shell extension]