That's why I stick with (K)(L)ubuntu 10.4 LTS (which will be supported until
April 2013)

Betas aren't for everyone. I am running Natty (Kubuntu) without a problem
but it is based on KDE 4.6 which has been around for a few months and not
Unity which is new. People should exercise caution re: Natty for several
reasons.

Unity is the default desktop. It is a work in progress and very different
from the classic desktop. You have to change the way that you currently
work.
Unity works with Compiz, but changing Compiz settings to the cube for
example can mess things up.
You cannot run both Unity and GNOME Shell. Those who try it are going to
mess up their computers.
If you want the classic desktop you will have to install it separately.
If you are not a Mono user or are a Rhythmbox fan, Natty Ubuntu includes
Mono-based Banshee as the default music player.
The download for Ubuntu is large (DVD sized). Kubuntu is still CD sized.
Maverick has a year of support left and Lucid two years more (desktop
version), so there is no *need* to upgrade. Jaunty users have no choice, but
to upgrade.
Canonical is heading in a new direction with this release. I like their
plan, but it is going to frustrate those who like familiar things.

There are also a few good reasons to install Natty, but wait for the stable
release.

The new kernel is great.
Booting is faster and shutdown even faster.
Bugs with Plymouth (ugly screens) seem to be gone, at least for me.
If you have a touchscreen (I don't) Natty has better support.
Software Centre is much improved. You can recommend and vote on
applications. There is talk of a try before installing feature, but I have
not seen it yet.
downloadsquad.switched.com/.../ubuntu-software-center-to-offer-ins\
tall-free-application-test-drive/
The installer is simplified even more and you can upgrade via the installer
or if you insert the DVD into the drive.
GNOME Control Centre is included with Natty Unity.
Global Menu is great. Saves screen space and prevents accidental window
closures.

If you want Natty but are afraid of Unity then you can install Xubuntu or
Kubuntu (smaller downloads). If you want the Classic GNOME desktop then you
can install it from XFCE or KDE. Then you can just switch to GNOME at the
login screen. The problem with sticking with Classic GNOME is it won't be in
the 11.10 repositories according to Shuttleworth. That is another reason to
stick with Maverick or Lucid. It will be in those repos to end of life.