Despite me not being a twink anymore, I still look over the community to provide assistance, I had a few threads back then providing on alternatives before the coming of a TBC dungeon release.
http://forum.warmane.com/showthread....-various-stuff
The biggest blow is the lose of speaking to the opposite faction,this was good for us 70s so we can communicate, learn from each other when meeting,practicing, etc. There are some twinks who are probably unknown to you that I speak to, and without this, they will kill you on sight, some crazy op from some weird buff they be getting from somewhere, need to check it out.
Kudos blackshroud, the night elf was me in that picture, didnt know the old thread was archived on warmane :)
Recap:
Still not prepared - Only active members is Nanao, the leader, Bowtek, and some Death Knight who is an 80 twink, can't recall name.
Purple Haze - Few members active.
TwinkleLittleStar - Few members active.
The Twisted Naaru - People like Kazzad, the lead, Dujin and Xujinko, co-leaders, are on randomly, but if nothing is going on they just log out.
Twinks Army - Run by Twlnk, I think he also runs Old School Twinks, 60s.
Twinks on Steroids - We told them they can BG with us if they use normal weapons, but these guys are super inactive. However, some of their members made promise to help out with Sunwell/TBC runs when it opens, they have been helping in getting World 70 drops for new twinks, and helped with Kil'Jaden boss outside of Magister Terrace at the time.
Other:
Sweeper Squad - These guys is not guild but cross faction is a MUST for them. Among their members is an alliance 72 rogue twink.
Dark Lotus - Warrior blood elf and a a few other twinks sometimes log in, hangs out in Ghostlands sometimes.
Power of it - Kilamanjaro, if not in goldshire or Dalaran, he is mostly in Ghostlands
Reloaded - Cerbz, can't remember full name, formerly twinks on steroids.
Ignite - Timtac logs in when a number of twinks are present and or visble in Dalaran or Goldshire.
Set Sail for Fail - Morningdove is sometimes on.
other guilds
Terrifying Twinks
There's more but i haven't got time to look. You may not be able to invite them into a new guild, but you should be able to have them meet up, despite the lose of cross faction chat.
~ Twink Ambassador, Mr. E ~