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PS3 Firmware 2.80 Details
UPDATE!
Firmware 2.80 was released on June 24th 2009. http://blog.us.playstation.com/2009/06/23/ps3-firmware-v280-update/ and is an optional update that you are not forced to install to sign into PSN.
Also according to the offical blog it:
Thanks to Blind Monkey from the forums for pointing this out !
Original Article
According to; http://www.ps3news.com/PlayStation-3/ps3-firmware-2-80-update-changes-detailed/ the latest firmware update does the following: