Its term time - and my time to look at things on the web is much depreciated. But I've been having fun playing with websites I refer to in lectures. (This year, as an experiment, I've been putting all my links up on my delicious page, as I refer to them in lectures. Two weeks into term, and I've already pointed my students to 212 websites. The students seem to like it - spare minutes at the end of a lab session can be spent browsing this "extended set reading", and its a nice record of the large spread of material we cover, even just in passing).
Todays choice, in particular, is the Bridgeman Art Library website. I'd recommend it as a place to idle away those art historical yearnings. Crowding round a slide cabinet all trying to see miniature slides of Giotto all seems another lifetime away - only a few years on since I remember elbowing Zoe in the ribs to try and get a better look at the annunciation. The Bridgeman has 323 images by Giotto alone available online. (Maybe having resources like this available would have improved my student essays!)