Today I'm trying out
– Save time by scheduling your uploads to multiple social photography sites, blogs and merchant facilities.
– Discover how well each photo is performing by seeing all available statistics from each of your networks.
– Interact with your followers by commenting across all your sites from one easy to use location.
The service works very nicely: you first connect to your networks and your existing photos are imported to the service so you already have statistics on your content so far. You then can post new content, selecting each time to which networks you want to post to.
Currently supported are Google+ (Publishing to albums only, no post creation as yet.), Facebook, Flickr, 500px, Smugmug, Tumblr and WordPress. The effort is headed by, developer of the G+ to WordPress plugin I have been using for over a year now, so I'm sure there are lots of improvements to come.
Try it out for free at http://fotost.at/