Extension Framework

Extension Framework

I've just posted a quick design I did for an extension framework to be built into ui.core.js to make it easier to build extensions to widgets.  The work is checked into the dev branch for the spinner that Ca-Phun and I have been working on.  Might not be the best place, but I didn't want to mess around anywhere else unless someone told me to.
Wiki Page: <a href="http://wiki.jqueryui.com/Extension-Framework">http://wiki.jqueryui.com/Extension-Framework</a>
Example of spinner with an extension: <a href="http://jquery-ui.googlecode.com/svn/branches/dev/spinner/demos/index.html#spinner%7Cextension">http://jquery-ui.googlecode.com/svn/branches/dev/spinner/demos/index.html#spinner|extension</a>
Please take a look and let me know what you think.  I know the example doesn't really do anything useful, I was just trying to highlight the possibilities.
Thanks,
Brant