I think the point is being missed. Wikipedia does not set out to manipulate search engine results, that's just a happy accident of its content being pretty good and many search engines weighting its content appropriately.
We make the internet not suck by putting the information on our website, maintaining it and permitting its re-use and modification subject to a reasonable licence. Our method of organization is thus an alternative to using a search engine. It's far more modest than google because it's not trying to aggregate everything that's out there. People work on what they find interesting and use the resources they know about.
All anybody needs to know is: Wikipedia exists and it can be found by all decent search engines. Its content is indexed by the same search engines so it's easy to narrow down a search to prioritize content from Wikipedia.
I remember talking to a TV journalist about 15 years ago, no stranger to online life. When I said how useful I found Altavista, the Google of its time, he lamented that it didn't work, because new websites were being created so quickly there was no possibility it could ever keep its indexes up to date. Again; completely missing the point. We don't need to be able to find every single thing on the internet, only the useful stuff. A huge amount of the useful stuff is on Wikipedia.