Using the commercial version of iframely is expensive. I racked up 1000 hits in just a few hours.
I also have a self hosted version, but that doesn't render things as nicely as the real API.
It would be nice to be able to whitelist the domains that would use the real API, and have others use the self hosted.
It would also be nice to have a hook where the resulting html can be preprocessed (when they do iframes for example, and we have no way to changing them after the fact).