Back to the original thread...
If you want other problem creations from this book, try these:
Speed's been covered. Moving on...
Command enhancement: A slotless +4
competence bonus to Cha? Look at all those great PrC's that use Cha for cool abilities, not to mention classes like the Paladin and Sorceror. Stacks with a Cloak of Charisma. Joy. At +2 it's a bargain and a half. Oh yeah, and the usually-stackable +2 morale bonus to Will saves for all allies within 30'. Can't forget about that one.
Energy Drain: No limit to how many times a day the Enervation effect can be used, no save. Let's see, 16th level fighter using Shield bashing, that's 4 attacks per round, 4d4 negative levels assuming all hit...or a dual wielder with Shield Expert and Improved or Greater 2 weapon fighting so you can use the Shield bashes in addition to your other weapon attacks. If you want to be boring (and more sick) have it on armor and just do touch attacks all day long. Multiple touch attacks if your BAB is high enough. Hmmm, can you use off hand attacks to do this too? Only a +2 cost.
Ethereal: No limit on how often you can Ethereal Jaunt for +2, or take the whole party ethereal for the +4 version. How much would you pay for an item that allowed you to cast an awesome 6th or 7th level spell at will?
Fearsome and Charming may not the most broken enhancements around, but I think that an always on Charm effect and Fear aura should be bumped up in cost a fair bit.
Arm of Nyr:
Unnamed +2 bonus to Str and Dex per arm added, and a +2 deflection bonus all for 13k? Players who want this sort of thing will gladly cut their own arms off to get it. (Or they'll start thrusting their arms down every mysterious small, dark hole that you can throw at them, which is usually a player's greatest fear when encountered)
Equerry's Armor: It's a very cool item and not overpowered, but I think 10k is just too cheap. The +2 full plate portion alone is worth 5650, but I don't think that +2 Dex and +10 move to your mount is only worth 2.5k (doubled). I suppose that the utility is limited, but a character who wants this armor is going to want to sleep on his mount anyways. Still, it's not a huge issue when compared to some of the other items in this book.