Also this app from Sun is supposed to interact only with MediaWiki servers… So as soon as person dependant on it encounters another wiki on another engine… game over? :)

Yep, I am advanced user, but as such I have experience of setting up wiki and kicking less advanced people to use it. :) Believe me – telling people that they need nothing except their browser instantly beats “you have to download that, install this, set it up for connection with server, etc”.

I agree with you that Wiki is supposed to be used for what you’re saying, but this doesn’t mean people don’t use it in different ways.

You’re forgetting that you’re probably more of an advanced user, but your Mom or Dad might not be, and with the help of software like this they could also contribute to the net. No, it’s not the best solution, but it will be useful someone, and that’s the point.

Upd: looking at actual description from Sun it seems that it is supposed to be more of converter from something to wiki, not editor. Makes sense if you want to flush existing docs in another format to wiki.

Also I think MediaWiki for personal use is total overkill. It’s engine that is built to scale up, not down.