Most IHO ROMs are sync'd with CM7. CM7 uses a customized version of ADW Launcher. Harmonia, however, uses the stock Gingerbread Launcher. To get this functionality on Harmonia2, search the market for "ADW Launcher", download, and install. If you'd like, spent the couple bucks on ADW EX. Its got more functionality and is more updated then regular ADW Launcher.
Tapatalkin it from my IHO CM7.2'd, MIUI Themed Optimus V