At the same time, I want to point out that having one Wikipedia be the default one (e.g. www.wikipedia.org goes to a particular (the English language, in this case) Wikipedia) has real benefits for the goals of the project.
In short, we want to avoid balkanization of wikipedia. We need French, Spanish, Chinese, Madagascaran nationals working on the English-language Wikipedia if we want to head toward an overall NPOV.
There's a reason that science, diplomacy, and academia always consolidate around a particular language (Latin -> French -> English). It's because those disciplines need a pool of neutrality that's as large as possible.
It's not better for the project if everyone just sticks to their native language.
Just trying to keep things in perspective, tc