I've just released my 25 map pac-man hack:

http://www.cis.rit.edu/~jerry/Software/gamehacks/

It's an extension and re-working of Sil's 6 map hack. I expanded it
from 6 to 25 maps, added color support, added limited vertical tunnel
support (first map only for now)

I also expanded the map and color ordering tables to be twice the size
as before...

Does anyone know the URLs for T-Bone, Snake Eyes, Blue Justice or
Pac-Fan?

It's got the following maps:
; map 0: Sil's Vertical Map
; map 1: Hangly Man
; map 2: Puckman
; map 3: Midway
; map 4: Yorgle: Triple Tunnel
; map 5: Yorgle: Illusion
; map 6: Yorgle: Arena (Umlaut Llama)
; map 7: Sil: Ms. Pac-Man Was Here
; map 8: Sil: Power In The Tunnel
; map 9: Sil: Dangerous Bottom
; map 10: Sil: The Two Crosses
; map 11: Sil: Ms. Pac Attack was here too
; map 12: Sil: New York, New York
; map 13: Snake Eyes: Shuffle
; map 14: T-Bone: Slithery
; map 15: T-Bone: Corners
; map 16: T-Bone: Halves
; map 17: T-Bone: Sidestepping
; map 18: Jeff Morris: Xen's Revenge
; map 19: Blue Justice: Crazy 1 (WavyTunnel)
; map 20: Blue Justice: Strange 1 (Bubbles)
; map 21: Blue Justice: Strange 6 (Cloverleafs)
; map 22: Pac Fan: Ultra 1 (The Sides)
; map 23: Pac Fan: Ultra 2 (The Hand)
; map 24: Pac Fan: Ultra 4 (doublecross)

romset and asm are available on my site, link above.

-s