Last week Apple issued an advisement bulletin to its channel partners noting a production decrease of iPods and certain Mac models. The resulting decrease in production will cause a supply shortage in the coming weeks.
Apple informed resellers that they should place orders for approximately 4 weeks worth of their top selling iPod models adding that supplies could become very limited within the next week.
In addition to warning of iPod shortages Apple also warned resellers to place orders for at least 3 weeks worth of stock for existing Mac notebooks, specifically mentioning the MacBook and MacBook Pro but not the MacBook Air.
Such advisories are usually a good indication of revisions to the mentioned products.