I think is important know the iOS versions diffusion to determinate how to invest the own develop.
So in the net there isn't many source to have a clear scenario of what happen.

But I had identified some link of interest as following:

this is a link that snap the scenario at october 2012 http://insights.chitika.com/2012/ios-6-adoption-one-month/ the source is Chitika (http://en.wikipedia.org/wiki/Chitika) . This report clarify that the iOs 6 have 61% of market share, iOs 5 the 29% (5.1 and 5) and the rest is iOs4 and other.

Already link are:

http://pxldot.com/18754186750

Today I have found interesting articles about java framework developing.

The first link is an implementation of opensource java plugin framework:

http://jpf.sourceforge.net/about.html

The next one article is an example of develop java plug-in from scratch. Form me this link is the best way to use a plug-in architecture in your application

http://twit88.com/blog/2007/10/07/develop-a-java-plugin-framework/

The last article explain how to read a xml configuration file in easy way:

http://twit88.com/blog/2007/09/18/xml-configuration-for-java-program/

A typical problem about windows mobile emulator is the internet configuration.

The first steps are to install the emulator

Install device emulator to manage the images:

Standalone Device Emulator 1.0 with Windows Mobile OS Images

Choice which images do you want, 6 or 5: