[jQuery] Saving Alert or Message Box

Hello all.
I'm looking for a nice alert box of sorts. I don't want the user to
have to click on it. Just show a message in a window for a few seconds
that says "Your data has been saved" then fade away.
I'm doing an ajax post to save form data and without the user seeing
the page refresh...they may not realize
they've actually saved the data.... :)
Anyone seen any cool plugins?
Thanks,
Mike