I have an idea

what if not only counted posts but also all the words you write?

Hmm, that would be pretty cool. :3 I really don't think there's a way to implement that, though, at least not without some intense coding. XD

That would be good, but like Shadow said, I don't think we can. :/

What do you mean? Shadow could put something in on the Profile page that you could edit with the number of words you write, like Nicknames. So, it'd look like this:

shadowsowner888
Admin

Nickname: Kumori Lawliet
Posts: 20859
Words Written: Story One: 12345, Story 2: 67809, Story 3: 175905
Reputation: 220
Join date: 2009-06-08
Age: 15

etc.

I'm pretty sure I could code a plugin (with some help) like this for MyBB, and I'd be able to have it shown right under posts or whatever. I'm sure it'd be very interesting, but it'd have to not count quotes and stuff like that. xP
If that's what you mean, it's a possibility once we get to MyBB. Otherwise, I think putting stuff like that in your badge slot / having a dynamically generated image with a wordcount in it is a good idea.

I agree with Arianna. I actually know where to get some nice little "Badge" type word-counters that you could use. They're really easy to use too.