For people who have Flickr accounts, and contacts listed in them, Flickr Contact's Photo Browser is a webpage that will let you see the photos uploaded by your contacts in the last 1, 3, 5, 7, or 14 days. Each contact is displayed with their most recent upload, and you can then click 'more' to see their other photos within that time period (or 'load all' to load all images).
Limit is 50 contacts: If you have more than that for a given time period, I suggest you get yourself fewer friends :)
I don't know if anyone else even has contacts listed on Flickr, but it was a neat toy to put together, and an interesting technical experiment (doing the entire thing in HTML/JS means that the code could be put on anybody's website who wants it, even if they have no server side scripting support).
Anyway, if you think it's cool, let me know.