There are fields for things like youtube on profiles and in posts, along with messengers, so would it be possible to add one for flickr.com? That would be really cool if you could make that mod.
You can try this mod:
http://custom.simplemachines.org/mods/index.php?mod=621
Should work fine with 1.1.3 although it says otherwise. You may need to use version_emulate to make the install successful (search for more info).