I lucked out, it seems.
My warranty is good thru Sept 2012. I will likely use this a a daily driver until then. If I don't experience any other probs (what else could go wrong that's "bigger" than this?) I will likely have only 40k on it & will turn it into a weekend ride.
With a new motor, and with the deal I got, this is certainly no investment, but worth hanging on to for an enthusiast.
*Even if BMW knew of something....with my new motor....I am willing to "let by-gone's be by-gone's"!