Since I haven't used Android as my primary OS since 2.2, this might have changed but:
Seems like many of these launchers are meant for phones. How do I return to the default OS launcher once I've tried a bunch?
Go to settings>Applications>Manage apps>[Your current launcher]
Clear the defaults for your current launcher and press the home key. It'll ask you what program to use for that action. Set the stock launcher (most probably it's just called "Launcher") to always be used as default for this task and there you go.
Edit: AJerman beat me to it.