Something that I couldn't understand from appcelerator website:
If I use appcelerator to write a client-side python application for the web, will it require that users have silverlight installed on their machines?
I got the answer from appcelerator developer center:
The php/python/ruby scripts are executed in the context of the Titanium Desktop. So you will need to run it inside a session of Ti Desktop application, and not on a webpage.
Ti Desktop is a modified webkit that knows how to handle this scripts.
So apparently this tag is not for websites.