CORRECTION. There is a 32x slot. TYAN has one. It is used primarily to be split into two 16x slots. ABIT used this on their new SLi boards. The AN8 Deluxe SLi and FATALITY SLi use a 32x PCIe BUS that is split into two 16x slots for SLi. Now, in theory, that 32x slot could be used for that purpose, but since no card takes advantage of that speed and bandwidth, it is USELESS.
BTW, the socket 754 looks very VERY similar to the socket A. Do not be fooled by that.