Currently only Karmic (9.10) is supported. All more recent versions of Ubuntu lack at least one important package.
In order to install sugar-jhbuild, you need git-core and svn.
After installing and updating sugar-jhbuild according to the common instructions, you can use this invocation to install all dependencies automatically:
./sugar-jhbuild depscheck -s | sudo xargs aptitude -y install
Karmic (9.10) has a broken D-Bus security configuration that prevents sugar-emulator from working (because Xephyr cannot work). On all versions sugar-emulator doesn't work properly if the X server uses evdev as keyboard driver (because of a Xephyr bug).
- gtk-recordmydesktop may prevent sugar-emulator from working properly