bladeforums
knifeforums
jerzeedevil
microholics (rarely)
I used to frequent a few gaming sites under the same name, but not for a couple years (amazonbasin, lurkerslounge, diabloii, ionstorm, gamespy).
I'm also registered on a few gun forums (glocktalk, parkcitiestactical, hkpro), but haven't frequented those in quite a while either.