Also, trying to open the preferences (10.6.8) takes 20-30 seconds of beach ball frozen before the window comes up (and 5-10 to close as well, without changing anything)
There are ways to do it with apps for jailbroken iOS devices, though you're likely to get a lesser quality. You might want to have a look at this one for example, made by a former colleague: http://www.plutinosoft.com/idemo
There are even Android servers like AirBubble and Android HIFI that can receive audio but not video and clients like HoneyPlayer (audio) and iMediashare (audio and video).
The shared screen is of a slightly lower quality and there is some delay, but for most things it completely workable.
Of course, this app can only show you something that is going on in the app, buy you can use it for presentations, or helping someone over the phone.