(This post contains information about Wrath of the Lich King, read at your own risk)
One of the new features that I am personally looking forward to in Wrath of the Lich King is the Achievement System. These are various tasks and feats you can accomplish. Some grant a spiffy title to your character and some earn you Achievement points which you can spend for as of yet unspecified rewards of intrinsic and material value (at least in game).
One of these Achievements is to obtain Exalted with Argent Dawn and Argent Crusade. The Argent Crusade is a new faction in Wrath of the Lich King, but the Argent Dawn exists now.
I'm only about halfway through Honored with the Argent Dawn, mainly through questing in the Eastern and Western Plaguelands as I was leveling up.
There is another Achievement for becoming Exalted with all your factions Captial Cities. This carries with it the title Ambassador.Earning the Title is far easier for newer toons than older ones like Honorshammer since Blizzard dramatically increased the rate at which you earn reputation with the Capital Cities. For example, my Draenai Hunter, is already Exalted with Exodar. By comparison, Honors is only Revered with Ironforge.
Another title can be earned by gaining Exalted status with the 3 battleground reps.
I got something of a head start on this back before Burning Crusade released. One of the few accessible epic Tanking shields back them was awarded for being Exalted with Stormpike Guard (Alliance Alterac Valley). Since I wasn't allowed to roll on Tanking gear (I was a healer after all), it was one of the few options I had.
I will probably never forget the drama I caused by expressing an interest in a Draconian Deflector. This was a blue Shield that dropped at the end of Upper Black Rock Spire, a 10 man Raid in level 60 WoW. The Warrior in the party about blew a gasket. He ended up receiving the loot. I would later get a Draconian Deflector as a level 70 running some friends through UBRS. I keep in my bank to this day.
With the way Alliance is on my server, it'll be a couple of more expansion before I'm Exalted with either The League of Arathor or the Silverwing Sentinels.
I'm doing much better with the Outland groups. The only people I'm not Exalted with are the Ashtongue Deathsworn, the Netherwing, the Kurenai and the Sporeggar. I should be Exalted with the Deathsworn with a couple of more Black Temple runs.
I have given serious thought to working on my Netherwing rep. Those dailies were rough to do as Prot. I don't have a gathering skill so those daily quests are not open to me.
All told, I'm currently Exalted with 11 factions.
The Violet Eye
Scale of Sands
Shattered Sun Offensive
If anyone has any tips or tricks for gaining reputation with Argent Dawn or the Capitals, I'd love to hear them.