Techy question re Bluetooth

SWMBO has returned from a visit to a friends extolling the virtues of Bluetooth Calendar synchronisation. Friends hubby has apparently set up a system that automatically synchronises from Outlook to Sony Ericsson phone as soon as you walk in through front door (assuming both switched on of course). Hubby has subsequently left her so no idea how it works but it may solve some of our 'what are we doing at the weekend' discussions.

Anyone any ideas how to set this up - is it bespoke software or a feature I just can't find (or is matey just winding her up) ?