I can imagine Intel not caring, but you'd thnk AOpen would somehow make a statement about 'what CPU to buy for our motherboard'. When you are shelling out $300 for a CPU, mail-order (i.e. difficult to return), you kinda need to know you are getting the right thing.
In this case, it would appear the motherboard socket is referred to as "Socket 479" while the corresponding CPUs are labeled '478-pin'; presumaby to differentiate them from the ball grid array versions, which are '479-pin' - and which, presumably and ironically, won't fit into the 'socket 479' because they are designed to be surface-mounted in low profile systems! I guess the good news is, you can't actually buy a 479-pin, ball grid array version in retail channels, so you eventually come around to realizing you need the 478-pin!
Commell's website (another maker of Pentium M boards)
does say this, for the CPU: "Micro-FCPGA 478
Mobile Intel Pentium M / Celeron M CPU
up to 2.26 GHz @ 400/533 MHz FSB"; interestingly, they don't make mention of the socket type at all.
simply says "Intel Pentium M CPU (Dothan / Banias)
Socket 479" and does not address 'how the CPU is referenced'. I did a site-wide google on AOpen's website, and could not find one reference to the need for a '478-pin' CPU.
Regarding MikeC's reassuring statement that "All mobile Pentium M and Celeron M processors are by definition 479 pin processors",
I believe it may be more accurate to say, '...are by definition socket 479 processors' - since Intel themselves clearly label their Pentium M's as being 478-pin and 479-pin in their own literature.
Anyway - I'm convinced that the 478-pin Pentium M is what I need for the AOpen board ... but this is a good example of poor labeling if ever there was one! This thread is the best reference I could find on the web that deals with this issue! I would recommend a post-script to the AOpen motherboard review on the site, to short-circuit this obvious line of confustion for others embarking down the Pentium M path! You guys obviously used a Pentium M CPU, and it had an sSpec number; that sSpec number should translate to an Intel speclist, which - presumably - would say, 478-pin. That would be the most reassuring thing of all!
Thanks for everyone's time!