Hey there bitcoinut.
As da2ce7 mentioned, there's no need to call it an unofficial wiki, because everything that doesn't come from the developers is unofficial. That said, you might consider changing it from "Bitcoin wiki, the unofficial Bitcoin wiki," which is exactly like the current wiki header, "Welcome to Bitcoin wiki, All your bitcoin information needs." Confusion reigns!
If you haven't read the drug discussion thread, here it is. Long story short, the owner of https://en.bitcoin.it/wiki/
decided against listing certain merchants.http://bitcointalk.org/index.php?topic=6602.0
That's where this could be really useful. Instead of duplicating exactly what the old wiki is doing, you might consider just forking the pages you need and hosting an unedited merchant list. That could resolve some disputes in the community and actually be extremely useful to many, both newcomer and bitcoin devotees.