Meet some quetion about seting a wiki

I don't know anything about wikis, so I can't help there....

For the Google thing, it takes some time for them to index your site. Get a robots.txt filee on your site (see http://www.robotstxt.org for more info). Submit your site to the search engines, and then alsso add your site to link directories. Just google for link directories relative to your subject, and addd your site there. This will let google know more people are interested in your site, and will allow them to rank it higher.

download mediawiki from www.mediawiki.org

You also need to make sure you've got the meta tags in your site's header. Although Google will crawl around the web and look at your site, it does need information to enter into its database. I caught a Google crawler at it in my site's logs and realised I haven't got any meta tags (hence no listing). Oh well, I'm off to add them.

I agree with you on Wiki's, they are a lot more organized and easier to use than forums. By the same token, I can understand your users might have some reluctance to help create one. They give up a lot of interaction for better clarity. However, with mediawiki, there is also a discussion area, but I also admit there is a learning curve to get comfortable with it. In addition, with Wiki's someone else can delete all of ones work or totally changed the point they were trying to get across.

As far as meta tags. there are 2 meta tags I use, keywords, and description. Keywords are part of SEO strategy, although a small part. Description however plays a large role, not so much for search engine indexing, as it is to get people to your site, as it is what google uses when it displays search results. Here are a couple ideas to get you started.

meta name="keywords" content="SAT test experience preparation"

meta name="description" content="SAT test discussions including user experiences"

Google can take a while to index your site, years back, it was months, now it can be as little as a few days, although newer sites typically do not see frequent crawling for a while.