I'm building next year's bike and just won an XTR crank without the chainrings off of Ebay. That suits my purposes pretty well as I had wanted to get the Blackspire rings and bashguard. Blackspire just came out with an XTR compatible bashguard called the C4X RingGod.
My question is, where have you bought your Blackspire stuff? What about Canadians, any good places to buy Blackspire (please, not bikeroom.ca). I see that JensonUSA carries Blackspire chainrnigs and presumably will sell the bash guard once it becomes available.