[orca-list] Ubuntu 12.04 how can i use it

[Petr Bláha <hammet pb seznam cz>]

Hi list,
i have installed Ubuntu 12.04 beta 1 few days ago, but there is problem 
that orca doesn't speak in alt + f1 menu and it also doesn't  indicate 
window title when i press alt+tab so it is quite difficult to work with 
more than two opened windows at once.
I thing the problem is that unity 3d is not accessible yet, so what 
might i do when i want to use Ubuntu 12.04?
I don't know how to switch unity 3d to unity 2d, or do you thing that it 
would be better to install gnome-shell and use it?
Thanks for your answers.