MacBook Pro Revisions Shipping? [Update]

DailyTech.com claims that Apple has already made a number of quiet revisions to the MacBook Pro. While constant revisions are not uncommon for shipping products, the early MacBook Pros models appear to have drawn a number of criticisms (flickering, whining, heat)

According to DailyTech, Apple is up to (at least) revision D amongst the shipping MacBook Pros:

I spoke with Apple over the weekend, and to my surprise, some of the issues are well known. Known well enough in fact, that Apple has already started addressing these issues in updated MacBook Pros

Revision D (SN starts with W8611) MacBooks are said to have addressed a number of known issues.
Update:: It appears the two digit number that is described simply refers to the week of production and not distinct revisions. While fixes may have been incorporated, the # does not appear to distinguish revisions.