This new application will be available via Cydia, This is the result of a collaboration between iPhoneil.net and developer iKeyEx. This Grip Growl will run in a similar manner as the Growl application on the Mac.

Once Active  a new system of notifications will be added to the iPhone. The notifications for events  are displayed via a gray semitransparent window that will appear in the lower right corner of the screen. If ignored, with effect fade away after a few seconds, otherwise it will be interactive and will be closed by clicking the X.  We will keep you updated on how this de

[Via]