Badge Maker which lets you 'Make your own (unofficial) flickr badge. Print it out, laminate it, wear flickr with pride! Show the world how truly photographically geeky you really are!'
Hmmmm... that pretty much describes me all over! ;)
But seriously, I've found that flickr has been an excellent way to share photos and is easy to use and makes blogging with photos a breeze, which is probably quite unfortunate for people who actually read my blog. 'Honest! I read it for the articles/entries!'... Heheh...