For anyone who hasn't noticed, there is a note in the weekly update that they will be resoliciting submissions for Unwired.
It could be that they simply thought the matrix rules were easily understood and hadn't planned for enough pages on rules clarifications. Seems like that could be handled by judicious use of the editor pen and consulting with the original authors.
My not-so-crazy suspicion is that everyone here has so thoroughly groused over the Matrix rules that they are considering significantly rewriting the rules.
So all you matrix addicts might want to decide if you have the writing chops and flame-proof undergarments to get involved in Unwired.