flickr has a great API.
I am using the flickr API to manage my photography portfolio website. I can organize everything (uploading, naming, ordering, etc.) using the flickr album tools and then just pull it into my site.
...and that's why you don't use Facebook Like buttons and Boxes all over your site. because it looks broken and full of errors now. Also, I don't want to know what this outage is doing to all the "Log in with Facebook" buttons right now.
On a serious note: DNS issue.
The authoritative nameservers a.ns.facebook.com and b.ns.facebook.com seem to be "set up" like this a the moment:
*.facebook.com ->(cname) star.facebook.com -> no answer
facebook.com still resolves the correct (?) IPs, but www.facebook.com, developers.facebook.com, graph.facebook.com all starting to die as your DNS cache expires. That's why it still might work for some at the moment while it really is broken.