Using this great tool developed by Piotr Migdal on Stats.SE, I've created a tag map for this site. The node sizes represent tag frequency, and the sizes of the links relate to how often the two tags an re found together. Pretty nifty; gives a quick overview of the site. For example, I can see that we're rather active in homework and everyday-chemistry. Don't know if that's a good thing, but it's something to ponder about :)
Enjoy!