I found SiriProxy[0] right as I was switching to iOS 7 so I was never able to get it fully working on my phone. I did set it up on my iPad (while it was still on iOS 6) just to test and it was really cool but I never use Siri on my iPad and I eventually updated to iOS 7. This is really cool but I'm not going to route all my phone traffic to a server I don't control, any plans to open source this or at least parts of it?
Until then I'll just keep hoping that the SiriProxy guys can get it working on iOS 7 [1].
This is not actually a fix for SiriProxy because it intercepts requests to Google, not Siri. They use Siri for speech-to-text only and then do their own command processing.
When a user says “GoogolPlex, turn off the lights,” Siri hears this as “Google ‘Plex turn off the lights,’” interpreting that the user wants to Google something. Siri then searches Google for the words “Plex turn off the lights,” and this is where GoogolPlex comes in. We are able to get the words the user was asking Siri by intercepting the request between Siri and Google with a man-in-the-middle exploit.
Until then I'll just keep hoping that the SiriProxy guys can get it working on iOS 7 [1].
[0] https://github.com/plamoni/SiriProxy
[1] https://github.com/plamoni/SiriProxy/issues/542