Our BuddyPress Integration Extension is listed on the Inbound Now Marketplace and is provided complimentary to our Inbound Now Membership Holders.
When building custom fields for your extended profile you will see a metabox that helps a user create correct mapping between an extended profile field and a Lead field. Be sure to map the profile field to the correct lead location.
How to add custom Lead fields
Using a little bit of code a user can extend the available mappable lead fields. Please see this document for more information.