This Longhorn thing looks like quite a big change. Yet another way to write Windows apps … related to Mozilla’s XUL this time. It’ll be interesting to see how long it takes before people start using it. Predicted timescale for a decent number of customers to start using Longhorn? Any likelihood of backward compatibility for XAML etc to older OSes (specifically 2K and XP)?

BTW, there is now a Longhorn Topic Exchange channel. Ping it if you are talking about Longhorn!