With a bit of tweaking and some third party software it's possible to get your Nokia N95 (With integral GPS) to act as the GPS aerial - annoying as i've just bought a bluetooth GPS.
Having had a bit more of a play with the fly version, I really like the centreline option but found the implementation a bit clumsy - how about an option when you tap on the airport in question and in the sub menu (Which - for sake of example at Oxford - shows "OXFORD DME / OXFORD KIDLINGTON AIRFIELD / OXFORD NDM") add the option to go to the centreline screen with the airport already selected?
Oh, and for some reason the Centreline screen doesn't appear to know what the runways are for most military airfields and some unlicesensed airports (Lasham, North Weald all missing? If it's the source data that needs updating then quite happy to assist as it's an awesome piece of kit, otherwise.