[wp-hackers] Plugin Update Checking and the Plugin URI

[Benedict Eastaugh]

Are there any plans to add this for themes? Tarski has had this for a
while, and I've always thought it was one of its more useful features.
Basically we have an Atom feed which is updated every time a new
version is released, and that's checked by the theme every time the
Tarski Options page or the Dashboard is accessed.

http://tarskitheme.com/help/updates/notifier/