Updating Links and Tags

I'm in the process of updating some of the background material on the site. This includes adding a number of tags so it's easier to find, for example, all posts related to "Lunar Lander Challenge" when you're already at such a post by clicking the tag. This isn't necessarily needed that much - you can always search in the upper left of the page to get a similar effect - but some people may find it useful. I'm also trying to get the links on the right side to 1 line per link, updating some stale links, rearranging sections, and adding a number of prize and team links to the right side of the page. Hopefully some of the visitors will find this useful.