There are a number of wikipedia articles which are crappy, and some good writers who care about good neutral articles about JW's could certainly help.
I'll mention three that could really use some help.
History of Jehovah's Witnesses
Eschatology of Jehovah's Witnesses
The articles (aside from the last one) have some detail, but could certainly do with some fleshing out.
The last article has NO content, but as he is a very important person in JW history, I'm sure will be fleshed out within the context of history.
Thanks!
joshbuddy