All of the new BMW turbo engines have a HPFP and they still are reportedly failing even on brand new 2011 models. I don't know what, if any, changes have been made to the pumps but the problem is not fixed. It's one reason I got an M3 (naturally aspirated and no HPFP) instead of a 335i last year.

Ethanol in the fuel has to be a contributing factor IMO but no one has proved that conclusively. If I had a BMW turbo engine, I would definitely try to keep at least a half tank of fuel in it at all times just to make things as easy as possible on the fuel pump. I have no idea if that would really help prevent a pump failure but it's what I would do...

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