On the Decline
My WotC spending is on the decline.
I have enough D&D material to be happy and if I need more I can usually borrow a book from a friend to get whatever I need. There really isn't anything out there than interests me enough to pay for it.
I used to buy a bunch of the d20 Star Wars books, but that is on its third reboot. I'll pick up the third core rule book this summer. If I like it and it doesn't work well with my current stack of books, I may just sell off my old books and keep the latest version. Star Wars usually only gets pulled out for one-shots or short campaigns, so I'd be fine with one good book.
My gaming money now is more likely to be spend on aids or third party products. I'm currently looking at True20, Spycraft, and Skull and Bones as possible next purchases, but even those won't be bought if I'm not nearly guaranteed to be playing them.
I guess I'm currently at critical mass and can play most anything I want with what I currently have on my shelves. So, unless something comes along that really makes my life easier or significantly adds to the gaming experience, I'm not liable to spend more money.