[Waffle Software brings out a major update][link] to it’s [Google Notifier][notifier] plugin. Jesper lays down some specifics in [this blog post][blog], and has posted [a tech profile here][tech]. The [new page for G+G][link] is just beautiful.
[link]: http://wafflesoftware.net/googlegrowl/ “Google+Growl”
[blog]: http://waffle.wootest.net/2009/08/16/googlegrowl-3/ “waffle → Google+Growl 3.0”
[notifier]: http://toolbar.google.com/gmail-helper/notifier_mac.html “Google Notifier”
[tech]: http://wafflesoftware.net/techprofile/gg.html “Google+Growl tech profile”