Would be great to see Pivotal Web Services (powered by open source Cloud Foundry - http://run.pivotal.io) added to Paasifier. We have excellent support for all of the runtimes you consider (minus .NET currently), and quite a few of the data stores.

Not so much. The main selling points for me:

* no money exchange in the car * tip is decided and built-in * cleaner more comfortable cars * polite and professional-acting drivers

I get none of these from 99% of cabs. And even UberX is superior to the average cab experience.

The app is nice, but if the service sucked it wouldn't be enough to convince me to use Uber.