Thank you, KnightRider and Taz for putting together instructions for building a customized friends list for Farm Town:
http://r1.slashkey.com/forum/showthread.php?t=594410
I'm hoping that you won't mind if I add two things:
First, make sure you designate the list as a "GAMES" list. That way, you will see only game posts from the friends you added.
Second, you can customize the list so that you only see Farm Town posts by removing the "other" games. To do that, you simply click on the arrow in the top right hand corner of the "other" game post and select " I don't want to see this". It will remove all the posts from that specific game "forever". You may have to do this several times to remove all other games, but it really doesn't take long until all you see is fabulous Farm Town!