Finally some official info on what's new in Blue&Me 5.4 from one of the dev guy from the Blue&Me team. As I understand, there will be other upgrades coming with more SMS reading improvements. I don't really get the Nokia part though...
The Nokia section reads :-
We have added compatibility with SyncML 1.1/1.2 , as used on current Nokia phones. This is to download the address book automatically.
Instructions:
1. Check the Fiat site page for your mobile phone and follow the 'step by step' instructions
2. If the installation fails 3 times, remove the phone and restart the phone after checking the SyncML configuration is setup correctly.