At noon today, Kaelten of WowAce fame posted a thread on the WowAce forums discussing the future of their massively popular project. There's quite a bit of nitty gritty coder lingo that you don't really need to know unless you're involved in WowAce, but there's other important information for us normal folk, too.
First, a few obvious things are pointed out. One, WowAce became big. Really, really big, and I imagine much bigger than they had ever imagined. The way WowAce is set up doesn't work so well with that much of a load and that many mods and packages being developed. Additionally, the amount of bandwidth they used monthly is absolutely enormous.
To quote: "As it currently stands files.wowace.com pushes out an incredible amount of addon updates. In an average month we're talking about more than thirty terabytes of data! In a busy month clearing sixty is no problem, and I don't even want to talk about what happens on major patch days."