Synch between buddypress xprofile and wordpress simple profile on a multisite

Hello,
I cannot figure out how to synchronize the bio field on wordpress...
What I would like to achieve is to define a set of fields in each budypress profile tat will sortable and search able. Therefore I will be able to sort users on several composants.
I have been told there is a buddypress module for this, but how can I make it synch with wordpress bio field ?
Second question, maybe I can use the new profile API, will it wise to do so ? how can I make that ? IS it a heavy php job to make a sortable list based on 8 to 12 items ?
Best rgs,
Hervé