I'm currently trying to integrate Flickr with my blog. The problem is that Flickr currently doesn't support categories, so every post lands in the default category, which isn't what I want.
I see two options here:
1) Add a "per user" default category. Since Flickr has it's own login for my blog that would easily solve the problem.
2) Hook into the XMLRPC call that creates a new post and set the category there. (I haven't found out how to do that; The result would be the same, thoug a bit more difficult: Check the user name, apply a new category.)
Can both be implemented?