Add Any Gadget to Your Gmail (including ours)

After watching a presensation online at Google I/O , they demonstrated that in addition to being able to add gadgets to you google home page ( www.google.com/igoogle), you can also add gadgets to you gmail page.
Here is how you do it:
To add a gadget to the left nav of your Gmail account, follow these steps:

1. Go to the 'Labs' tab under Gmail Settings.
2. Enable the 'Add any gadget by URL' experiment and click 'Save Changes.'
3. Now you'll have a 'Gadgets' tab under Settings.
4. Enter the URL of an OpenSocial gadget spec and click 'Add'.

In EnduroTracker.com's case the url is: http://endurosocial.googlecode.com/svn/trunk/trunk/qaendurotrackeroauth.xml