Hi Crusoe, actually I am interested in XUL, but the main problem with it is that it isn't really set up to make custom elements in C++ that can participate in low level ways such as paint themselves, handle their own layout, stuff like that.

Mshtml has a lot more extensible hooks in it for that type of thing.

Hopefully one day Gecko will get more extensibility in this area and then be a better fit for MoI as an application platform.

- Michael