I don't understand why this is a surprise to anyone, but at the same time I can't understand why anyone thinks that Sony will reintroduce PS2 BC anytime soon.
The two main reasons why Sony decided to phase out PS2 BC from PS3s were to lower the production costs of the PS3s and to reinvigorate PS2 hardware sales for as long as they can. Their first goal is a success since the PS3 should be profitable by the time the 80GB models hit later this month and their second goal will likely be reached when PS2 sales start to drop after the holidays.
Sony isn't going to reintroduce PS2 BC to PS3s through a firmware update until they stop making a ton of money off PS2 sales. This Christmas will continue to see great PS2 sales, but come January, expect to see them take a hit.
