You can now pull in photos from your Facebook account. Right now, it grabs everything, but I have controls in the works to let you choose privacy settings or hide individual photos.
There's pseudo realtime support, too. Proxigram should update basically as soon as you upload the photo.
As always, everything is on Github.
Quick update on Proxigram: it now supports Flickr, Yahoo's popular photo sharing service. If you're a Pro account holder, it will even get realtime updates from Flickr, just like Instagram provides.
The "point" of the app has changed, too. The goal is to build a single API endpoint for all of your photos. While the photos will still be hosted on their respective services, you can now get one read-only API to see a normalized view of them all.