I'm sure other people have probably seen or linked to this site before but I just have to link to it (warning, some of the images are NSFW).
バカ集合 is a site that collects all sorts of silly images. A partial list:
Stupid stuff from everyday life -- 0円 shop!
we love テレビ東京 -- Apparently TV Tokyo doesn't change it's programming for anything. Earthquakes, important political announcements, important stuff overseas. If it's breaking news, they don't care!
Famous people making silly faces! -- Warning, this may take a while to load.
OF COURSE there are Morning Musume モーニング娘 pictures but even better than that, apparently Miki Fujimoto 藤本美貴 hates everyone.
(Warning! Last link is slightly disturbing) Japanese fanboys are a bit over the top.