I have been exploring and developing an application in Python for mission critical work in the commercial banking arena. 
Banks are way conservative in selecting new applications.
I need real proof of stability and others using. 
Have looked at the Python site but now I'm hoping this crowd can tell me more.
So far I don't have a development bank partner which I will need next stage, so I'm gathering proof and pitch info. All help and comments appreciated.
Python doesn't have anywhere close to as much money backing it as MSFT or Redhat etc.  If Guido gets hit by a bus, Python is in trouble.
I <3 python for a lot of things, but a financial transaction system probably wants a real, trusted, stable company backing it.
Edit: this isn't flame bait; this is a major lesson learned from watching a colleague push a platform backed by a small company, and the resulting 'business-strategic' nightmare that ended with his project getting dropped in favor of someone using a far crappier project with lots of money.  There's more to project success than the technical bit.
Python in the enterprise: Pros and cons