After a few days away I came back home to find not two Phoebe chicks like I originally thought, but four. Three of them were still in the nest chattering away seemingly ready to fly at any moment and one sitting on the fence below the nest, still being fed by mom. I was able to quickly take some pretty bad shots while mom was always nearby keeping a keen eye on me.
UPDATE 06-09-11: All the chicks have flown the coop.