New-old piece of terrain, previously included in 40K Macragge box is available from GW online store. It is very nice piece of terrain but the price is little controversial. For 15 GBP you can buy complete smaller vehicle or box of figures.
For 28 GBP one can buy Valkyrie from some independent retailers and build much more original terrains. Or you can buy few bitz of virtually any model at eBay and got similar result for half a price. This however will need much more effort, so as for the announced destroyed Rhino terrain, it is up to you what to choose. At least, we have a choice...
Update (08/08/2009): Full sprue of Battlescape terrain at John's Toy Soldiers blog.