hmmm
my friend. I already told you the scope of forums now days.. im not putting your motivation down..thats why I advised you to go for Mobile related blog rather than forum
because single person can manage blog easily.
Personally me too
as a common visitor, join forums just to see the hidden download links.. and most of time I forget forums after downloading..so you can see how visitors think towards forum..
still its not too late.. I believe you can make an attractive blog at gsmDNA
anyway just analyze how others are managing..
best of luck.