Hello,
I just found the list of directories which are good for submitting your forums. List is tested, no need to add reciprocal link..
ODP/DMOZ
Linkcentre
Ezilon
Search-O-Rama
Search Sight
01 Web Directory
4DO
Abilogic
Absolute Directory
Add Link
Add your site free submit
Apexoo
Autumn Tree
Busybits
ldmstudio
Iozoo
Jayde
King Bloom
Links Match
Lost Directory
pedsters planet
Poddys
quick silver
rdirectory
So Much
Tsection
Velendi
Web World Index
World Site Index
Wow Directory
Zenome