Anyway, in this beta release, they've done few major bug fixes such as...
*. Overlay scroll-bars are there by default! (for both Unity and Classical desktops).
|Ahh those Scroll-bars!... (in both Unity and Classic Gnome)|
*. There is the Gnome Classic Desktop - Yes, from the log-in window you can choose between the Unity or the classic Gnome desktops.
*. Better Compiz integrations (yep... Compiz is the default "effect" handler for Unity desktop...).
*. The Network Manager applet (Gnome) has been given a patch for working with the "libappindicator".
*. Banshee remains the audio player - Nice...
*. The other applications and their versions are basically the same at this moment (libreoffice, etc).
So, if you can't wait till they release it officially, then why not give a try for Ubuntu 11.04 beta 2?