Note that contrary to the opinion of one of the replies above, WinCE/PocketPC is based (albeit loosely) on a trimmed-down Win32 kernel.

Having looked at the Mognet stuff, I'm pretty sure you won't get this running under Java on an iPaq, unless you install Linux on it. Why? Because as the Mognet FAQ states, there isn't a card & vendor-independant way of accessing a wireless LAN nic under Windows, and that includes the PocketPC platform (unfortunately). Linux has a set of APIs for talking to cards such as these without relying on a vendor-specific driver implementation (not entirely accurate, but close enough - basically, the Linux drivers expose a common API at a lower level in the kernel)

Also, the JVM (Java Virtual Machine) is not an "emulator". A JVM is a JVM. You don't emulate Java, you interpret and run the bytecode.