Here is a list of normal raid days, who usually leads and what they typically go to kill. Leaders are rotated to some extent, and destinations are usually chosen based on signups and previous progress.

Ulduar 10 and 25 man can and is done on any raid night.

• Duck's of Doom/Healers R Us - Wednesday
  Leader: Huiy/Hondadylan
  Destination: Ulduar 10 or 25 - If U10 then normally the first 5-7 bosses are done. If U25 then 3 ish.
  
• Raid Until Dawnbreak - Friday
  Leader: Luey
  Destination: Ulduar 10 or 25 - If U10 then usually up to keepers (unless we cleared that on Wednesday). U25 is rare but will attempt 1-2 bosses.
  
• We r Epic - Saturday/Sunday - Unoffical Raid Night
  Leader: Hondadylan/Swordai
  Destination: Pre-Ulduar hard stuff, OS+drakes up, Mally etc
  
• Dinac's Killing Squad - Monday
  Leader: Dinac
  Destination: Usually Ulduar 10 continuation - clear out any remaining keepers and move on to Vezax and Yoggy!
  
• Swordai's Rough Necks - Tuesday
  Leader: Swordai
  Destination: Progression raid, Ulduar 10 typically but may be a raid on Crusaders' Coliseum. Currently focusing on General Vezax in Uld 10.
  

Currently we don't penalise for being saved to:

• VoA - PvP is not a guild focus and while there are some nice items here, having control of WIntergrasp is too unpredictable to schedule raids
• Naxx 10 - we occasionally go here to gear up new members or to attempt an achievement or two, but no problem if you want to PuG it (you'll just have to miss out if we go there with the guild!)

You can PuG these with only the fear of being mocked for being saved afterwards. Being saved to anything else when you're signed for it will result in an EP penalty.

Thanks to Luey and Dinac for compiling this information.