I just want to play with it for a while. I do not need to own them. Anybody who cares to show off their phones to me – Blackberry, Palm, Windows Mobile, Droid, Maemo(?), and others?

I want to see how these different mobile OS can fire a small gadget. How they can make multi-tasking a breeze or lousy in eeny weeny phones? How they handle the richness of graphics? Which OS has the coolest applications and so on and so forth?