So it looks like we'll have to wait until April at the earliest for any PC compatible hardware to become available. Any suggestions how we can get this working would be most welcome! (Ideally without buying a load of Macbook Pros!)
When Ivy Bridge comes out there will be some Mobos with Thunderbolt on them, and your display will work with those. There may also be some Thunderbolt PCIe expansion cards at that point as well (for a premium price, but cheaper than a Mac). Until then you may be up a creek as apple has exclusive rights to Thunderbolt at the moment.
They are really nice displays, it may be worth the wait and the upgrade.