It may be 2008, but HP is still selling the 25th Anniversary Edition. Function wise, it is the pretty much the same as the 2003 "Silver 12c Platinum". However, that is where the simularities end.
I took my Silver 12c Platinum (my first 12c BTW) to an office store and compred the speeds of the Silver vs. the 25th Anniversary Edition and the Classic model. The Silver was the slowest. What lead me to buy the 12c 25th Anniversary Edition: memory, cash flows are up to 80 (from 30), better contrast of the keys, and the professional case.
If anyone asks about the 12c, I recommend the 25th Anniversary Edition.