Hey --
as others have said, yes, the PS/2 connector should work just fine. Keep in mind that Ms draw a little more power than other PS/2 boards, so if you decide to use a PS/2 to USB adapter, any off-the-shelf model might not work. There are specific adapters known to work well, so make sure you get one of those. Check out geekhack.org's forums.
Also, once your love for the M becomes something severe, I suggest considering buying a brand new Unicomp keyboard. There's something about the new Unicomps that I just can't get over. Maybe it's because the keys are brand new, but I don't know -- the M design doesn't really "age" so to speak. These boards last forever.
I got myself an original M. But then I got a Customizer 104 and then a SpaceSaver from Unicomp. The M is now in storage.
One nice thing about the Unicomps (aside from being dirt, pube and cruft free) is that they come with USB adapters.
Enjoy your buckling springs!