What can you buy with the various Marks of Honor?

[Zuelu]

I've got almost 30 of each Mark of Honor, excluding Alterac Valley Marks of Honor, and I was wondering if I could do something else with them besides exchanging them for BoJs and Honor, or using them to buy certain mounts.

[Imperium]

there's an AV vendor that spawns during the early hours(peak hour) that can get you an S4 ring, the mount, a tabard and other various things. dunno what else.

[Adama]

If you bought the s4 (which cost to 40 Av mark, some other mark, honor and boj), you can buy mounts and only some lvl60 pvp stuff, gear for fun. Buy the Grand Marshal sett for example ! :)
But nothing else, so eventually you get a lot of mark, bagde and honor... ^^