Hi,
I would find it deeply regrettable if we would not use the full power of wikis for a voting process. What works on article pages works just as well on proposals. The only functionality that needs to be added to Wikipedia is a poll system, possibly within its own namespace, and a respective "Recent polls" list.
I have proposed a more detailed scheme here: http://www.wikipedia.org/pipermail/wikipedia-l/2002-November/007335.html
(URL needs to be pasted together if broken in the middle)
Regards,
Erik