I haven't read all the entries here yet but ..
I the biggest one thing that would spark new
interest in the Classics would be the 'Cold Fusion'
(or something simular) accellerator.
Perhaps some arangment could be
reached with Oli that would speed up the
developement and bring it to market.
I'm not sure PPC is needed for the Classics,
that would require new software, whats the point??
There are a number of items that would sell,
keyboards, optical mice, GFX cards, ect.
The key here is to bring the Amiga up to speed.
A 220mhz (or more) Clasic 68k machine could
probably be compared to about a 1.5gig mhz PC.
Its all about the 'Need for Speed' :-D