The Photos section of Google+ is really just a new "skin" on top of the existing Google Picasa Web. I use Jeffrey Friedl's excellent LR Plugin for PicasaWeb to publish my photos to Picasa Web albums. New Picasa Web albums automatically show up as Google+ photo albums. From Google+, you can then "Share" individual pictures or albums so they show up in your G+ stream.
Europe, Middle East and Africa