In my opinion, it's important that we don't split wikipedia between a .com stable version and a .org editable one.
Ads will greatly influence our neutrality, we cannot be seen as a totally free encyclopedia after such a move.
However, if we *really* need this, it can be considered. However, members must have the choice to opt-out. But only if we really need it, not if it can be simply useful. It must be an emergency situation, in my opinion.
~~~~~ Snowolf