This is what the batch number means:
3 = costa rica
1 = the year 2011
50 = week 50 so some when in December
B465 = position on waffer.
Hope this helps.
No,i meant he must be using an ES,but he has just stated he's got a retail,even though i was under the impression that "retail"chips are not officialy released till the 29th,apart from "official" testers.