That looks fine, but how is it different that the plethora of alternate implementations of that particular UI widget?<p>e.g. Bootstrap's popover: <a href="http://twitter.github.com/bootstrap/javascript.html#popovers" rel="nofollow">http://twitter.github.com/bootstrap/javascript.html#popovers</a>
Great start behanpsean!!!, have a look at beautytip for more ideas to add : <a href="http://archive.plugins.jquery.com/project/bt" rel="nofollow">http://archive.plugins.jquery.com/project/bt</a>
There are a bunch of ways to do this already, and this requires jQuery. The only way I could see this as being interesting is if it has no dependencies. I really wish people would stop developing with jQuery as a dependency...