I wonder if it will run all Java bytecode. Scala and Clojure would be great.

Plus PHP (via Quercus) would convert a lot of developers.

Edit: looks like it should!

http://code.google.com/appengine/docs/java/runtime.html

  App Engine runs your Java web application using a Java 6
  JVM in a safe "sandboxed" environemnt. App Engine invokes
  your app's servlet classes to handle requests and prepare
  responses in this environment.

Don't forget JavaScript via Rhino!

Someone already got Helma running on it: http://helma-ng.appspot.com/

I'd much rather have native PHP support than have to run PHP through an unnecessary layer of Java. Thanks but no thanks.

I never do this but...

Why was this downmodded so much? I don't get it. Wanting to have native PHP support seems like a perfectly reasonable wish.

[Edit: Now it seems out of context, but the parent was at -2 when I posted this]

Microsoft's Azure has support for native PHP with FastCGI.

And EC2 has support for everything.

Don't forget Jython!

In that case, you will want to read:

http://olabini.com/blog/tag/gae/

which includes:

* Dynamic languages on Google App Engine - an overview * JRuby on Rails on Google App Engine * Java on Google App Engine

Believe it. [update] Alright no one likes TinyURL. I get it. Here's a more informative tutorial about running Clojure on GAE. http://elhumidor.blogspot.com/2009/04/clojure-on-google-appe...

For when TinyURL dies:

http://fragmental.tw/2009/04/08/clojure-on-google-app-engine...

And, why use TinyURL here? Your destination URL isn't long; there's no constraining limit to comment URL sizes.

that would be very cool.

Ditto.

Ditto X 1 million.

Does anyone know is this is possible?

if their runtime is standards-based, I don't see why not.