Yahoo Help provides this:
b. Set My Yahoo! to automatically refresh your page:
At the top of your My Yahoo! page, click the Select Page drop-down menu, select Add/Delete Page.
Scroll down to the Options section, locate the Refresh Rate menu.
Select the rate at which you want your content to update.
Next time you leave your browser open to My Yahoo!, you'll see that it updates the page automatically.
I can't find the select page drop down menu, I must be blind!
Tags: