Memory for my iBook

[Metaphor]

I have a year 2000 366mhz firewire type iBook.  It's supposed to take 
256 more mb of PC66 SO-DIMM Ram.  I am having a heck of a time figuring 
out what I need.  What type do I need 144pin or 168 pin?  Is PC100 or 
PC133 compatible with PC66?
I am looking on eBay for this memory and none of them say which is 
compatible with the Mac.  Does it matter if it's for Mac or PC?
Here's an example of an eBay listing that I was looking at: 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3456353201

Help, help!

Thanks,

Maren

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