Tellin' you, dude. Ever since Marissa Mayer has decided that fucking up Tumblr is more fun than fucking up Flickr, Flickr's been approaching functionality again. Unlimited storage, nothing's public until you make it, they'll take RAW and it's automagical.
That's my Level 2 backup. My Level 1 backup has Dropbox auto-upload everything to the cloud, and then Lightroom watches those Dropbox folders. Fire up Dropbox, it auto-imports and auto-deletes everything in the folders so it's a quick'n'easy transfer. Not only that, but you can auto-tag a bunch of stuff. Then the good stuff gets uploaded to Flickr (department of redundancy department - there's a reason not everything the app grabs is public) and everything gets Rsync'd to the NAS.