A Consuming Experience: How to use Gmail aliases to organise emails and handle spam

I was listening to Leo Laporte's podcast of his tech show from the 16th, and they had a tutorial on transparent desktops (examples here (this is in french, diaporama is a slideshow, fyi) and here which I think are just TOOO kewl :)
P.S. If you do this, I'd love to see the results, and I would even try to post em here. :)
Or we could post a url, if you put it on flickr or some other site.

Now to the purpose of the post. (Did you think I'd EVER get here?????) lol
the url in the topic I found as a result of finding the tutorial on transparent desktops.
"What's a Gmail alias? Well if your Gmail username is "user", then a Gmail alias is an email addresss in the format "user+something@gmail.com". All emails sent to an alias in that format will be received by you at the user@gmail.com account."
Aliases can be a wonderful way to track which are the worst offenders in terms of spam, AND a similar idea could be used for passwords for sites. I read this in some newsletter, and thought it was a superb idea. Read all the details, at the title url, included are links to gmail, as further explanation.

Enjoy!