I too saw high volumes AH today ( and Friday also).
Today within Intel - there were lot of promotions;
( refer Yahoo news for intel - I read it sometime in the morning)
My guess - the new CEO announcement will be made any day from today - generally internal promotions are done after a CEO is selected( I beleive it is an internal candidate- hopefully from their mobile division)
Somebodys trading desk is handling some big trades. Most likely a huge mutual fund or hedge fund liquidating and another taking a position.Very remote possibility INTC buying in stock buyback.Clue to both days afterhour trade is lack of volume during the day and min. program trading running the stock up and down a dime every few minutes.