Congrats on your freebie. Im still a big fan of amithlon as well.
I still find it strange that people are so quick to believe that it only works on older hardware though. The 2 best (fully supported) amithlon machines Ive ever had were an athlon64 (bit old now, but at the time I used it with amithlon is was a brand new, cutting edge machine), and more recently a 3.86ghz core2duo machine. Sure, not exactly cutting edge these days, but Ive been using it with amithlon for at least 3 years now.
Ive even used amithlon on an i5 and i7 machine, although never dedicated either to amithlon as the core2duo works great. 68k performance on that box is vastly superior to a sam460 that is running native ppc code, and even beats my 1.5ghz mac mini/mos system running 68k code vs. mos running ppc code most of the time (the exception being when altivec is heavily used, but amithlon itself has untapped ways to counter that (x86 native code)).
Not that I have any interest in a vs. debate, but it (amithlon) is a great system, one that only gets better the more power you throw at it. 300fps in quake2, over 1000 fps in duke3d, runs any mame game that 68k mame will run flawlessly, nice quick compile times (especially when compiling in a rad disc (ram bandwidth on amithlon is unrivalled anywhere in amiga world apart from aros)), 720p video playback at full speed/framerate, and so on and so forth.