I had a quick look and cappuccino apps are not crawlable, at least the demos aren't. Sorry, but it doesn't look like cappuccino gets what the web is about.

As somebody who uses text interfaces primarily I don't think desktop apps are amazing anyway, even if I see that they are better for some tasks.

The web browser is the only graphical tool I use daily, I don't need things inside to look like desktop apps. shudder