I found the following posted on the FHCNet Mailing List.
An announcement was made in a Get_Satisfaction discussion today that is encouraging. Be Prepared.
Ron Tanner (Family Tree Guy) wrote:
In a few weeks we will be sending out a survey to ask people if they want their NFS sources brought over or not. Those who choose to not move them over, we will not migrate their entered sources. For everyone else we will migrate their entered sources. Essentially the form in nFS was to generate a citation. We will collapse these pieces to create a citation and titles other information will be in the notes. We will create sources for you (they will appear in your source box) and attach them to the person they are on in nFS.