A Slew (yes...a slew) of New and Changed Cataclysm Information

http://www.wow.com/2010/06/13/cataclysm-press-event-new-expansion-details/

You can read all about it there but here are the highlights I noticed...

Path of the Titans. Gone. Archaeology retooled to be more about showing off 'lore'. Not sure what that means. Sounds like only cosmetic or vanity rewards. So we'll all be doing it. Instead we get a new tier of glyphs "medium" glyphs that will be 'fun'. Whether this includes warlock green fire I dunno. Also glyphs are permanent. you buy them once and own them, like skills. Then you can choose from a list of which ones to use. bad for Scribes who make money selling glyphs. Though they are also redoing Inscription apparently.

Guild talents and currency. Gone. There are still 25 guild levels and the guild gets experieince from doing things like killing bosses, or partcipating in rated battlegrounds, etc. Perks get handed out automatically at certain levels. Also there are guild achievements. Once you get them you can do certain things including purchasing, with normal gold, mounts for yourself with the guild tabard on them, and stuff like new heirloom items. You'll also have reputation with your guild, like any other faction. It's per character. You gain it by doing things and running instances etc. Comedy gkicks don't remove your reputation. The Guild Control UI is revamped, and the guild roster will have information on the characters including what recipees they have even when offline.

Raiding. Grim Batol is one of the first raids. Five bosses. Supposedly defeating Cho'gall the final boss on hard mode moves the "narrative' forward, so i'm guessing cutscene. Vortex Pinnacle is a new 5 man in Skywall (it's in the Elemental Plane of Air).

Most importantly if you're locked to different raid ideas you can do lots of fun things....If you're locked to a 25 man raid you can split it into 3 ID's and do 3 smaller 10 mans. You can then have those three raids pick up at the same point the 25 man stopped in the future. IE you can say raid on Tuesday with 25 man. Clear the first wing of something, then split the ID run the next bosses as 10 man in multiple groups, but then the following day get back together as 25 raiders and you're back to where the 25 man itself initially stopped. PLUS raid ID's won't be strict, so if you've killed up to say Saurfang, and someone else has kiled up to Saurfang you can combine raids. It'll be based on which bosses are downed. So you could have 3 10 mans raid up and kill Saurfang, and then on the following day shuffle those raids and run a 10 man with peopel from all 3 of those raids for the next bosses.

10 mans won't be an easier tier than 25 mans also. Same difficulty. Just more gear dropping in 25 man. That's not new info though. Also supposedly there will be more algalon like encounters. Optional opened bosses.

Skybreaker and Orgrim's Hammer are in Deepholm, but Skybreaker has shot down The Hammer. WTF. I call bullshit.

Two new battelgrounds on launch. Twin Peaks (Warsong gulch capture the flag on an Alterac Valley uneven map) and Gilneas (Arathi Basin in urban combat). Also rated battelgrounds. rated teams won't face random people only other rated teams.