Take a look at Mahalo.com's search return for the iPhone. The page is dominated by outdated information, the most prominent is an ancient YouTube video of a CBS news report from prior to the phone's release. The most-asked question about Mahalo's user-generated search results was how they would keep the information up-to-date. I've heard Mahalo's creators promise that it would not be a problem, citing Wikipedia as an example. They have obviously failed in the near term. If they can't even keep information on a hot topic like the iPhone relevant, Mahalo may have to find other ways to survive.
Toward that end, it's interesting to note that the the Mahalo iPhone page came up on the second page of Google results for the iPhone. So, it seems that Mahalo is becoming an SEO rather than a search engine.
