HHHmmm I wasn't sure where to put this but..
If you have a google android handset (1.6 or above) you can now update your google maps to use the google turn by turn navigation system for free.
http://www.google.com/intl/en_uk/mob...tion&dc=gh4smm
I gave it a little go yesterday and found it very good (the voice is synthetic rather than human but I'm used to that lol). It ran in the task bar at the top and did indeed direct me properly while I walked home yesterday.