Notification app Growl just launched one of the biggest releases in its history, complete with a jump to the Mac App Store, a fully searchable notification history, and an iOS style Rollup feature. The new $1.99 app, which is unfortunately Lion only, no longer installs as a system preference pane; it's a wholly separate app with a menu bar icon for quick pausing and a brief list at your most recent notifications. Apps and panes aside, the biggest change in version 1.3 is that all notifications are saved in the fully searchable History tab, and the new Rollup feature brings browsable iOS 5 style notifications to the desktop when you're away. The preference pane has been tweaked slightly, but pro users will be able to tweak notification starting positions, display styles, and everything from opacity to duration just like before. Along with the new App Store release, Growl redesigned its site, which now highlights some excellent third-party styles like Mono and Hud.
If you prefer the old Preference Pane version of Growl or are using Snow Leopard or earlier, 1.2.2 will still be available for download. 1.3 is still rolling out to the App Store, but you should be able to grab it here if you can't find it in search.