The 2.3 is very, very soon, new dungeons, new quests, new epics, new epics, and even more epics. Also, if you're playing on european servers, the voice chat should be activated on all servers now.
2.3 on PTR soon
A lot of today's blue posts kinda confirmed that the 2.3 would be soon = expect it for today or tomorrow.
[blizzquote="Bornakk;http://forums.worldofwarcraft.com/thread.html?topicId=2288171071&postId=22876564816&sid=1#159]For those who are most concerned, the patch 2.3 PTR is coming soon and you'll be able to check out all of the changes that have been made for leveling 1 to 60.[/blizzquote"]
(2.3) Engineering epic flying mount
If you're planning to respec to engineering only to get this mount, I guess it will be cheaper to buy the Cenarion Expedition one for 2000 gold.
[blizzquote="Bornakk;http://forums.worldofwarcraft.com/thread.html?topicId=2288171119&postId=22877561952&sid=1#2]We are currently planning for the Epic version to require 375 Engineering skill.[/blizzquote"]
(Live) Gurtogg Bloodboil hotfix
[blizzquote="Daelo;http://forums.worldofwarcraft.com/thread.html?topicId=2288041425&postId=22876965538&sid=1#0]2.2 introduced a problem where Gurtogg was not hitting his main melee target as much as he should. We've resolved this so Gurtogg has the same innate miss chance as he possessed in 2.1.3.[/blizzquote"]
(Live) See you next year Dark Iron Dwarves
Dark Iron Dwarves attacks definitely won't be available again this year.
(2.3) New flight path in Stranglethorn Vale
[blizzquote="Eyonix;http://forums.worldofwarcraft.com/thread.html?topicId=2288051007&postId=22877660539&sid=1#5]We're adding a new flight path to Rebel Camp in northern Stranglethorn Vale. It's coming in patch 2.3.[/blizzquote"]
(2.3) +33% Damage on healing bonus testing
It looks fine, and we'll experience soon on PTR.
(2.3) Champion of the Naaru
An interesting question, will the Champion of the Naaru (rewarded if you completed the old Tempest Keep attunement questline) title will come before or after your name ? According to Bornakk it's before.
[blizzquote="Bornakk;http://forums.worldofwarcraft.com/thread.html?topicId=2288041107&postId=22877563351&sid=1#4]All titles currently come before the name, so it should be the same as the other existing ones in this regard. The PTR will be up soon for you to see it too.[/blizzquote"]
Increased bag space ?
Not yet. It shouldn't matter too much anyway with the new guild banks incoming in 2.3, I guess you could just create a fake guild on an alt and have a huge bank with hundreds of slots available.