I look forward to your, no doubt, in depth findings and analysis.
After a lot of tinkering around in the wee hours, I figured out how you guys got your stars. Though I'm climbing through the rankings like a geek possessed, stars are purely street cred, or just getting some friends to give you stardom
While you are at it see if you can sort out the "Search" aspect.
One really major blow is the minimum word size is too small. I know this has been commented elsewhere, so some of the wind isn't in the search bars sails. I don't personally feel it's been implemented that well either.
You should be able to search for +mac +mini which would find all topics talking specifically about the mac mini. You should be able to search for +mac -mini to find all posts about mac but not mini. IE specifically exclude mac mini's from the search.
Because of the word length limit you can't. It's really not hard to make the search test for single word lengths below 4 charaacters. IE test the whole string length is greater than 4.
One way around this is to search for "mac mini" in quotes. If both words are longer than 3 characters, you can use the +word -word.
If you search for word1 word2, you'll get postings containing word1 or word2.
Try some out and see how you go. Just run the same search inside the topic you find to locate postings with the search term. This is where I think the system could work better, by doing that automatically, or highlighting all your search terms in the topic.