There is no wap.wikipedia.org.
It's:
May be worth having a very quick placeholder page at http://wap.wikipedia.org/ that just says "Try one of these sites" + the 3 links. (Kind of like what http://www.wikipedia.org/ has, except it doesn't have to look any good at all - in fact, anyone using a mobile device would probably much prefer it to be exceedingly minimal).
-- All the best, Nick.