I have a TeamSpeak server online at lb2.no-ip.info, and since I am not working at the moment I am there most of the time. There are others who come and go throughout the day, and if I am not doing anything for the boss, er wife, I am game for flying. I check the longbow section at Magnum's TeamSpeak server every once in a while at
http://www.osgrocks.com/voicestatus.php?server=c0275ec9dfae6ae91a501f887dd770c9 but usually don't see anyone there except weekends.
As for flight times other than weekends, using a TeamSpeak server and messenger services like ICQ/AIM/MSN/Yahoo messenger - will let us know who is online and willing to fly more than the hit and miss we get here at the forums.