Actually, to unlock a T-bred, you only have to connect one bridge. I think it's an L3, but that's unimportant.
My research shows that this board does, indeed, unlock t-breds. It also has the 1/5 pci divisor. That means that at 166fsb x 11, the only thing running out of spec will be parts of the motherboard. And considering the imminent release of 166fsb t-breds, it's probably designed to work just fine at that speed.
172fsb x 10.5 should easily be achievable. 180fsb x 10 should work fine in most cases. 190fsb x 9.5 should be possible in a good portion of systems. 200fsb x 9 should be possible with good hardware and a little luck. Some people might achieve 212fsb x 8.5, but that's pushing it. None of these settings will significantly increase the heat produced by the processor, so they are safe with a stock heatsink. I suggest trying these out in the order I posted them. BUT back up your data first! When you push the pci bus to its limits, it has a tendency to corrupt the data on your hard drive. There will be no physical damage, but gigs of mp3's can be lost. If you don't want to worry about this, 166fsb x 11 should be safe, because the 1/5 divisor will keep it at default. It's also pretty safe to assume that 172fsb x 10.5 will be fine, too, since you will be running it only 3% out of spec. What you get beyond that will be highly dependent on your hard drive and any PCI cards you have, as well as your video card.