Everything is still obtainable except for ZG mounts, those changes will occour only when Cataclysm comes up, to be simple, everything that is going to be to easy to achieve with the ridiculous amount off health and armor from level 85 will be going out.

Your answer is neither simple nor correct. There have been no other updates on what titles will become unavailable except the "undying" achievements which require completing content without dying.

not to be nitpicky, but TOGC especially at Anubarak will be much harder in Phase 3 simply because our health levels are higher compared to our dps.

Sorry weres the word "titles" in my post?

A small list off achievments that so far were already out from beta:

The Undying
The Immortal
He Feeds On Your Tears (10 player)
He Feeds On Your Tears (25 player)
Champion of Ulduar
Conqueror of Ulduar
A Tribute to Skill (10 player)
A Tribute to Mad Skill (10 player)
A Tribute to Insanity (10 player)
A Tribute to Dedicated Insanity
A Tribute to Skill (25 player)
A Tribute to Mad Skill (25 player)

So is the wolf mount from the end of ToGc going to gone as well? or is the tribute run still available even if you no longer get an achievment for it?

Sure would be nice if Blizz let us know this kind of stuff.

Learn to research before you complain. From the following post by Lyllira, dated 15 Oct and relinked by MMO-C a few times since...

http://blue.mmo-champion.com/topic/22379/mounts-and-items-removed-in-403

"Crusader's White/Black Warhorse and Swift Alliance Steed/Swift Horde Wolf
As the attempt-based tribute system is being removed from Heroic Trial of the Crusader, the Argent Crusade Tribute Chest will no longer spawn, and these mounts will no longer be obtainable."

If you missed out, blame yourself.