Hi Arron, thanks for this link (and many others). I remember when I first got involved in educational blogging it was fairly simple to pull together tags from any blog (via technorati ), twitter and flickr and display them on one page. I made a few for different educational events in Scotland. A marvellous opportunity now lost, hopefully to return.
If you are going to/interested in Communicate.06 and you use any of these services you can tag stuff with communicate.06 and it will appear on the page. There is a load of services that do the same sort of thing (KickRSS and suprglu.com/ for instance) I’d guess Harnessing the Web will cover some of them.