MEX4ERIC  Worked like a charm. You must load this first before the SMC update.  
(Version 1.3)

WIZZARD1  It is not noted in any of the documentation that this does not apply to a MACBOOK2,1. I have a macbook, 2 gig dual core and the update is not for it. This update is not for machook 2006 or early 2007; only from later 2007 and forward. it would be nice if this was documented.  
(Version 1.2)

BDOG  Wow, firewire transfers are way way way faster now. Best firmware update ever! :-)  
(Version 1.1)

MACGUY7  After installing the firmware update, my USB ports are now extremely slow. Printing a color page takes 20 minutes... scanning fails... and my TV Mini HD device won't even start up.  
(Version 1.1)

WFM  I just applied this to my 2.16Ghz and it works fine after. Seems to be a tiny bit snappier.  
(Version 1.1)

JOSHP  after the superdrive 2.1 firmware hosed my macbook's optical drive, i am untrusting of these updates.  
(Version 1.1)

BDOG  Download link yields the 1.0 version, NOT 1.1.  
(Version 1.1)