After you go download Avalon and Indigo Beta 1 RC, you can play with my latest version of AvPad, which includes the scripting support I've been blogging about lately. Because I haven't downloaded the signed version yet, I only included the source, so you'll have to compile yourself.

Of note, there is a complete custom style "custom.xaml" in the AvPad project - so if you are struggling with updating your syntax to the new styling model, you should check it out.

AvPad Source