As GNOME 3.6 release date comes closer, its development is picking pace. New features are being added and bugs squashed in the process. GNOME always lacked a clock and alarm application, but good news is it will be soon integrated in the next Gnome release. The screemshot below shows how the timer of Gnome will probably look like.
If you needed an alarm application in GNOME, this is what you will probably get.
There are still a few tasks left, like integarting these things with Evolution API. Hopefully that will be done soon so that we get a complete clock application in Gnome 3.6.