[consta]

Wow .. that is something I have been looking for quite some time. In the meantime I decided to make a custom solution, but yours seem to work way smoother.

- Do you cache images? If so, how long are they cached? - Are there any restrictions, beside adding the attribution link, for commercial usage?

[waleedka]

Thank you. I cache images on App Engine. I have a simple API to force cache eviction (email me if you need it). There are no restrictions other than the attribution link.