LOLCODE has now been featured as the DokuWiki of the Month for May 2008. It was really the first interview I had conducted about LOLCODE, and I was grateful for the chance: for me, working with the underlying DokuWiki software has been nearly all pleasure, with very little pain.
I launched at the end of May 2007, using DokuWiki alone. The week following the launch was full of sleepless nights, just buzzing on the volume of attention the site was getting. …[It] quickly made the front pages of Digg, Reddit, Del.icio.us, BoingBoing and StumbleUpon, [and] we served over a million pages in less than a week. The site still gets thousands of new visitors a week from people who still haven't seen the joke.
If you need to run a Wiki for a project, unless you have specific requirements leading you elsewhere, I would readily recommend DokuWiki.