Have you heard about Wikiseek? If you read any of the big popular A-list blogs you might think it is the second coming, but I wouldn’t say that just yet. It is nice though. They have also released a Firefox extension that allows you to slip their search into Wikipedia.
If you use Firefox you can install the Wikiseek Search Extension to add Wikiseek to the search form inside all Wikipedia pages. Just click the install link below and follow the instructions. Once you restart Firefox you will see a Wikiseek button in the Wikipedia search form.
Pick it up and let me know what you think.