Nearly everybody has alts, but not all guilds want them in the main guild.
With Guild Channel, you still have a guild chat channel with alts or gamefriends outside of your guild.
It provides an interactive tooltip with detailed information about players in that channel.
It basically works like GuildFu or something, but cross-guilds, with alts and with information about who is who!
I created this addon nearly 2 years ago and all members love it. We have disabled the normal guild chat to force newcomers to use the custom channel.
Maybe you find it usefull too. Give it a try.
Comments are welcome.