On the whole, it is a pleasant SDK, with clear documentation and plenty of Stack Overflow examples (some ugly, some neat).
What did bugged me was that WebKit-based browsers get very upset when Facebook’s ‘Login’ button/dialogue inserts an IFRAME with an https scheme when its images are hosted on a server with an http scheme. This would have been less of an issue had OSX Chrome actually reported the issue.
After writing my own Facebook log-in routine, everything worked like a charm — up to converting the beautiful d3 word cloud SVG to PNG, when Chrome freaked out that I was manipulating Blob and Object URIs. I updated my use of the word cloud to render directly to a canvas from which I could gather pixels to create a URI for my image.
I would have liked to have written the app to use a Facebook ‘canvas’ — to appear within the Facebook site itself — but my host, Vision Internet, require a modest £50 a year for a usable SSL certificate, which this application really doesn’t justify, yet.
I was pleased enough with the results to use the Graph API to produce word clouds of friend lists activities, too — which took about two hours.
What’s the point?
I’ve learnt how to tie-in with Facebook, which was no big deal. I’ve learnt how tight Chrome is, which was news.
Can it pay? No, I doubt it — but when I was developing the first prototype (an hour’s code), I was using d3 bubble graphs, and it might be interesting to see those bubbles filled with images from a paying agency — particularly if the agency had a friend list of news providers: instant and up-to-date promotional posters for current affairs. That would be fun.