I've searched the net and couldn't find anything like this. There are loads of plugins that include/download pictures FROM Picasa or Flickr and let them integrate in the blog.
I am searching for the other way round. I do lots of blogging with my mobile device and add new blog posts with pictures directly "from the road" (via postie or an application on the phone). When I am at home I still have to add the photos to my Picasa or Flickr albums. So it would be a great idea to have pictures directly and automatically uploaded to flickr/picasa once they appear on the blog.
Is there a plugin already which does this (although I couldn't find one)? What do you think about this idea?