I've spend the last couple of months hacking together a new 68k DOOM port based on the excellent ZDOOM (v1.22).
I already ported BOOM (my second favourite DOOM port) to 68k a couple of years ago but ZDOOM is even better than BOOM

Looking good for an Xmas release (I'll upload it to AmiNet as per usual).
Features:
Double buffered 256 colour display
Native ASM 16 channel sound engine used for SFX and emulated MIDI playback (MUS format)
International keyboard mapping
RTG support up to HD (using native CuberGFX API)
Mouse scroll wheel support for weapons switching
An awesome icon
ZDOOM TC support
Jumping
Mouse Look up/down
A Console
Particle Effects (blood, rocket trails)
Custom Skins support
Gun Sights
A Chase Cam
Rotating Overlay Map
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