[iBook] RAM decisions

[Mike Cole]

I have this original ibook, and I want to upgrade the RAM so I can install
OS X.  I have seen many memory sites state that although the MAC specs don't
say the clamshell can take 512, they really can.  Now I have this concern
about the firmware update, OS X, and non-Apple RAM.  The 256MB stick at the
Apple Store looks good, because it's a guaranteed stable upgrade. However, I
would really love to get 512MB in there.  I got one opinion already to go
with the Apple RAM for stability reasons.  I'm looking for more opinions on
this before I buy the RAM tonight.  Any insight into what I should do would
be appreciated.  I'm really tempted to just get the Apple RAM because I know
it will work with OS X, but that voice in the back of my head keeps saying
"NO! get 512!!

Is there any non-Apple RAM that is known to be compatible with the OS X/
Firmware situation?  If so, do they offer a stick of 512?

Thanks,

Mike