While many churches have gone to lucite pulpits in some attempt at relevance, the pulpit used by John MacArthur at Grace Community Church is ginormous. It is also famous as one of the first pulpits built on a hydraulic lift, capable of being raised and lowered into the platform.
Phil Johnson, blogger extraordinaire and right-hand man to Johnny Mac, wrote about the pulpit here. The pictures he speaks of in that past can be found here, along with the dimensions (just in case you wanted to build one yourself).
Finally, here is one confessional post from a former church member and custodial staffer at Grace. He tells of "riding the pulpit."