My preference would definitely be Always On, although for reasons already stated this isn't currently an option due to data rates and phone battery life.

I imagine it would be relatively easy for Nokia to add location aware profiles as discussed in the excellent podcast. There has been a Symbian app called CellTrack available for my Nokia 9500 Communicator for some time now which does exactly that using just GSM data: http://my-symbian.com/s80/software/a...Auto=479&faq=2