18) The relentless release of as many 3.5 books as possible before 4E is released.   :\ 
Judging from the past, we have about 3-4 more years before 3.5 becomes obsolete.  That's part of the reason that I don't really get excited about the new books.  They're smoke and ash already.  The same data will have to be re-released again with 4E on the cover, so what's the point?
I love D&D, but I don't like feeding my money to WotC in massive fist-fulls just so I can stay current with the rest of the world.  Computers are one thing, but I don't really see a need to "upgrade" 3.5, especially when there will probably not only be a 4E, but a 4.5 as well.   :\   Give us another ten years of 3.5, please.