Migrating MOSS 2007 My sites to existing Sharepoint 2010 Mysites

Hi ,

We have two sharepoint farms 1. MOSS 2007 and 2. SharePoint 2010 . Both has mysites implemented . I know this is wrong but this is how I got the environment when I joined .

Now I am migrating MOSS 2007 to SharePoint 2010 . I migrated the content databases .

I have to now migrate the Mysites from MOSS 2007 to sharepoint 2010 . What is the best way . How can I keep the Mysites data of users in  both farms i.e. sharepoint 2010 mysites and mysites data migrated from MOSS 2007 .

Please help , let me know if there is a straight forward solution or any work around.