WoWAce is a set of libraries heavily used by developers to create many of those nifty AddOns we know and love like FuBar and Grid. Unfortunately, their Wiki site lost its data and the latest usable back up is over two months old. Everything since then has been lost.
In an effort to reconstruct the lost pages, they have pulled HTML copies of those pages from Google Cache and now they need your assistance. You can go to their Rebuilding page and help them convert the HTML into Wiki format and repost it on the site.
If you have some spare time, head on over and help them get back on their feet so they can continue to help developers create those AddOns we can't live without.