I received Apple MacBook/MacBook Pro keyboard firmware update today, on my MacBook. The bulletin describes the update as:
This MacBook and MacBook Pro firmware update addresses an issue where the first key press may be ignored if the computer has been sitting idle. It also addresses some other issues.
The update took less than a minute on my MacBook.
I also received the Pro Applications 2007-01 and Pro Applications 2007-02 updates again. I suspect this was due to my install of the Aperture 2 trial software on my MacBook. My iMac did not receive the updates and does not have Aperture 2.
None of these updates required a reboot.