I've seen a lot of startups using Rails, but are there any out there that apply for YC funding that are using something more enterprise focused for their application? If you've considered using the GAE and choose something else, what was the deciding factor?
Rails is a framework. The equivalent on AppEngine would be django (Python) or J2EE (Java).<p>So, no. Don't make you framework decision based on what your platform provider has to offer. Do it the other way. Make a decision on your framework, then choose a provider.<p>If the question is provider vs. own hosting? There is nothing wrong with using a paas-provider for a startup. Make sure there is no lock-in.
I'm considering it (applying, not using AppEngine. If I apply I'll use AppEngine for some parts of it).<p>I do Java AppEngine work in my day job, so if you have questions let me know.<p>(When you say "enterprise focused" do you mean your application is enterprise focused, or do you mean GAE/J is? Because there are some issues with using GAE for enterprise software and it's important you have considered them)
We'll be applying with a project that uses Google App Engine, built with Java. We had originally started with PHP, and had considered Rails, but we found that we were much more comfortable using Java for our product, which retrieves and works with very large sets of data.