Upgrading to android SDK 2.0

This time the upgrade is much simpler than with previous versions. Upgrading is now supported from inside android tools itself.
Assuming you have already configured your installation to be able to install as root and run as unprivileged users as was described in previous posts, upgrading is a simple task, just run

$ sudo android

the select the desired components to install (i.e.: SDK Platform Android 2.0) and click Install Selected

Once you upgrade you still need to fix the permissions again, to do it run

$ wget -qO - http://android.codtech.com/android-tools/android-fixperms | sudo bash -s -- --sdk --sdk-dir=/opt/android

If you have installed android SDK to a different directory replace /opt/android in previous command by the correct location.

Hope this helps.