Update due to inclusion of tier 4 tokens and how they will be handled:
Void crystals will be held by Mimbari and folks that go on the runs can use them for enchants when we have enough and they post what they want to use them on.
Team 2's loot rules: One item per run. This includes the Tier 4 tokens. They will not be handled differently on Team 2's runs, due to the consensus of the group of regulars that run it. However, if it is a profession recipe, and no one else can use it, it does not count towards your one item. If you already have won something, and something drops that no one can use, you can still get it, rather than shard it.
Signing up in GC: Class balance, gear, and leader's discretion will always come before sign up day/time. Posting in GC is just an interest list, letting me know you are available and want to come if there is a spot. This is the same as several runs posted in Gem. Signing up does not guarantee you a spot. The folks that are regular and have been coming the most, are prepared and on time, will have dibs at the spots first.
Note on pieces that you win in Karazhan: It is expected that you will get the piece enchanted/gemmed with the best gems/enchants available.
Addons that may be helpful for you: Bigwigs or Deadly Boss Mods for boss fight warnings.