Well, I think there are enough people having "joy-gasms" about this API (Just remember kids, it is not an original idea and is nowhere near the first to do something like this).. so I am not really even going to bother with it.  I may install the plug-in.. but probably won't because I hate browser plug-in apps.

I'll let Daniel handle the ranting on this.

It looks like it could be interesting, but this will have a hard time getting wide usage IMHO; you have IT departments that will frown on this you have to make ALL your users install yet another program to make your page usable to them.. users HATE being told what they need to view something.