I'm running the version just previous to the latest one and find it reasonably stable. What I mean by "reasonably stable" is that it will go for about three or four days with relatively light usage (i.e. RSS feeds and the web) before it will crash.

I get a warning too before it crashes as the sound of the screen taps disappears first and then about five or six seconds later the tablet reboots. If I exit the application I'm using in those five or six seconds then the sound of the screen taps returns and the crash is averted.

I can live with it crashing every three or four days - if it was crashing every day then I'd reflash to OS2006.