A couple of years ago I talked about how you can emulate a Blackberry on your PC if you don't own a physical device. More recently I've needed to emulate a device running Windows Mobile and found the best instructions on how to do this at the Google Gears website.
As you can see above I managed to get it working and without too much bother. In fact it's very straight-forward -- just make sure you read the instructions on the Gears site in detail.
It's no coincidence I found the instructions on the Google Gears site as it's Gears which I'm interested in developing with.
The requirement is to make an existing web-accessed Domino application work offline for handheld "PC" users who will then be able to "replicate" back to the server once they have the signal needed to do so.
It's all very interesting stuff and I hope to be able to share what I learn along the way with you guys. At some point there'll probably be a "Hello world" demo download that shows how Gears can work with Domino data.
My only concern with this approach to development is that, while it might test the code works, it doesn't mimic the end result of the actual "user experience". If you care for your users then, at some point, you might want to get your hands on the real thing and run through the whole process with a mobile in your hand. This is what I plan to do before I declare it fully tested and working.