I own pretty much every book White Wolf's put out (both in terms of their WoW property and in general, I buy a lot of gaming books) and I have to say I found Luke's points about how the relationship between White Wolf and Blizzard as far as developing the lore in these books to be absolutely fascinating. Blizzard clearly wants to keep the development of the property and its lore firmly in their control, which on the one hand is totally understandable and yet on the other hand really shackles the writers hired to work on these books. You can't just throw in that Orcs like to eat human babies - any cultural note, even an offhand reference to humans having a lot of festivals throughout the year or trolls not liking large groups, needs to be accepted or rejected by the folks at Blizzard, which can really slow down the production of the books. The upside to this kind of supervision is that the RPG line can be used as a sourcebook for troubling lore questions for nerds like me. The downside is that it takes much, much longer to release the books if they have to go back and forth to Blizzard and wait for the team there to have time away from making the MMO in the first place to check what you wrote and decide if they want Harpies to be offended by flutes. The tightrope they walked between providing content and satisfying the folks at Blizzard is a problem I'd not considered in adapting something like this.
I would add one note to his list of possible solutions to the kinds of difficulties that developing a tabletop version of an MMO can cause, but it's a personal bias on my part. I don't think the ruleset they used (the Open Gaming License release of the d20 system created by Wizards of the Coast originally for their D&D game) works very well for WoW. Specifically, I don't think it does a good job of presenting the classes the way they feel in the MMO at all: mages in WoW do not run out of spells, for instance, the way they do in the d20 system. I really found, as a long time gamer, that a lot of the conversions didn't really feel like WoW anymore. Yeah, I know this is a minor quibble and using the OGL frees them up from having to design yet another gaming system when pretty much anyone who plays tabletop knows d20 already.
In general, I found the article interesting for an illustration of how WoW is branching out into other properties. And as a gamer I found it interesting to see how a game so clearly inspired by the tabletop genre (especially games like D&D and Warhammer) came full circle. Have you tried playing the game? Any thoughts on how well or poorly they succeeded in the adaptation?