We did not test the FastCGI technical preview with these application frameworks, due to the short release timeframe for the tech preview. It was tested with PHP 5 only.
In theory, there is nothing that would prevent Python and RoR from working with it, but in practice there may be certain incompatibilities / issues.
We will definitely be addressing these before the final release of FastCGI v1.0. In the meantime, we are investigating any short term solutions to making these work - but no promises right now :(
Thanks,
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