What should you do if your site gets passed in Google by the one and only Wikipedia?  With their authority, it’s often nearly impossible to outrank them for some keywords.  It may be a daunting task to outrank them, but there are still a few things you can do.

What I’d do is find other Wikipedia articles that are live-linking to the fore-mentioned Wikipedia article and remove that link wherever possible.  Although Wikipedia links may be no-follow going outbound, they are still do-follow when interlinking on their own site - so those links they have are passing a lot of authority.  Do whatever you can to nuke them!

You can also try and slip your link somewhere on that Wikipedia page.  This might be hard to do, depending on how heavily edited that Wiki page is.  If your link continually gets removed, try first building up an edit history and then try adding your link.  If you have a better reputation, your link might just stay up there!