NATS in Glasgow and Edinburgh are moving over to the electronic stuff in the next month or so.
iPhone app would be ideal - especially for those operating out of farm strips, such are common in Scotland due to the lack of airfields!
Raised the idea of uses for the iPhone etc at a recent CAA Safety Evening, but it drew only slightly negative (I think the negativity was about ALL mobiles) from the presenter.
To me, for VFR sport flight, the iPhone and its likes are undersung - if not vital - safety aids.
We had a twin-turbine heli land at Strathaven the other day because of a PTT problem. Could hear Glasgow but not transmit. A mobile might have made things a bit easier.
And I have had constant weather checks from Strathaven by text message in the air while trying to get through from Carlisle.