Sony released a new firmware for the Sony PS3 today. The latest firmware version is 1.92.
The PS3 firmware 1.92 improves the performance of the PLAYSTATION Store and support for PS2 games got enhanced. Late July Sony released the firmware 1.90 for the Sony PS3 which brought lots of new features.
Via the Sony Playstation site (Japanese).
Sony also announced (Japanese) the game line-up for the Tokyo Game Show later this month. I could not spot any surprises.