Location: ...an armor plated raging beast, that's born of steel and leather, it will survive against all odds, stampeding on forever... \m/ \m/ \m/ \m/ \m/
Re: Achievement system
I love the idea of putting it below the rep bar. There's alot of blank space there and these little icons would fit right in there, especially since alot of people have these huge sigs and there's just this big grey void below the avi.
I know what you're thinking Liner, it could be alot of hassle to do something like following someone's post count in order to give them a 10k post badge, but that would easily be remedied by putting a sticky in this section, similar to the name change thread for premiums, where people could remind the mod in charge of the section.
Awarding other, more occassional achievements like for instance "meltdown badge" for Bully or "conspiracy theorist" for Dib would be really no hassle at all for mods.
There could also be a badge suggestion thread, similar to the smiley one.