According to my wallpaper gallery count I have 21 walls on MT: http://shigemitsubaki.minitokyo.net/gallery?index=1
however, when I count it myself they only add up to 19... which is bizarre.
I can't confirm either total though 'cause I've forgotten how many wallpapers I uploaded here; less than AP, for sure, because I didn't upload most of my speed walls.
Thanks in advance!