[Freeswitch-users] BLF and presence_map for conference and fifo?

Hello, Just upgraded to FreeSWITCH Version 1.0.head (git-eeeaf41 2012-02-10 17-27-50 -0600) The BLF buttons on the phones now work much better, but I lost BLF status for conference rooms and parking slots. This worked just fine before, now it's broken. I did notices this new thing called presence_map.conf.xml, as well as a reference to it in the sip profile, but I can't find any documentation on how it works. What changed? My older version is 1.0.head (git-7531fed 2011-08-17 11-27-20 -0500) (BLFs work for park and conference, but go out when a phone rejects a second call). Any thoughts? -Tim