Hi, I have started a wikipedia alike website for subtitles. The script is used is theirs, MediaWiki. I have just finished setup this website so there are more things to be done to it, like adding movies and so on, but you can add them to if you like. Link: www.subspedia.com
Wikipedia is very much reliant on their moderators to keep things in check. Are you sure you have the time to constantly monitor your website for quality and accuracy? Implorable endeavor, I just think it is not worthwhile to keep quality assurance on this site, especially with all the competition you have. Then again, who am I to judge the value of your time. Also the "movies coming soon" is confusing, as first impressions seem to be that those titles there are ones for which there are subs, but confusingly lead to Yahoo pages. How will you monetize?
I don`t do this for money and I do not care about the competition. I just want to make something good