Axe has two posts up on the CIWS Phalanx-based C-RAM (Counter Rocket, Mortars, and Artillery) over at Danger Room:
Top War Tech Reader Suggestion #1: C-RAM which includes a note from the C-RAM executive officer on a base in Iraq.
Mortar-Zapping Gun in Action which includes a video.
The system has been noted previously on MO:
UPDATE: Strateg Page reports that the Brits are buying some.