Out of curiosity how many users are there on the other Amiga forums? Is Amiga.org one of the larger ones? Lemonamiga seems quite large... 
eab seems more active. I thought this one was dead after a couple weeks went by and I wasn't approved to join.
I unfortunately don't get to use my Amiga much, have a 2000 that I am trying to fix and then FS-UAE and AROS hosted.