If you have a P3300 taster edition you can take advantage of Google Maps for mobile.
Currently only available in USA, Canada, France, Italy, Germany, Netherlands & Spain. but UK coming soon.
If you didnt want to invest in TomTom you could try out this:
http://www.google.com/gmm/index.html
The only cost being a Data download.
Id reccomend reading here fully before deciding whether to install or not
http://www.google.com/support/mobile/bin/topic.py?topic=9112
Danny B
www.devicewire.com