A very interesting article as it basically clarifies the reason I WANT a N900, because its Linux based not merely "Linux Kernel" based.

I got stuck learning to code for Windows Mobile because every time I wanted to do something I found it was not supported in .NET mobile framework, or only half the information I want is in the registry with the other half somewhere else and no common index to tie them together. With a full Linux OS I am hoping things will be simpler, such as using command line tools and/or /proc to get information rather than having to rely on APIs and external libraries.

Of course another benefit is I want to learn Linux programming anyway and anything I write on Linux is easily portable across to Windows, but trickier going the other direction.

I can really see having a Linux PC in my pocket being hugely useful. Just playing with my iPod Touch jailbroken shows potential, but there is only so much you can do without risking breaking it because its not designed to give you access to its BSD innards.