I have said it before but I use Ipaq 1940 ( cheapest pocket pc with bluetooth at around £80-100 on
) + Tom Tom 5 and upload the aforementioned camera database free of charge from link below...
Pocket PC also acts as mobile outlook / word / excel and personal organiser..
Would be missing appointments n forgetting important meetings without it me finks..
Also you can rotate the screen display through 90 to get a nice wide screen view of the road ahead.. Works a treat on unknown b roads in the dark as you can also be prewarned or judge overtaking straights and hazards better..