I will soon be touring through France and plan to get a pay as you go SIM with data (quite cheap if you get an Orange Mobicarte, which are I think even available pre-activated on ebay), which means I will be able to use iphone apps

e.g.
Anyone know of a good accommodation/restaurant finder app? (analogous to the excellent UK Good Beer Guide app)
Anyone had any experience of the apps that have a library of bike repair techniques?
The Biggie: any good mapping/GPS ones? Would be very useful indeed, I think....
Cheers
George