Ants in an Office

I watched Snakes on a Plane a couple weeks ago on HBO (it was on, what can I say?), and in the spirit of Samuel L. Jackson, I've got something to say:
"I have had it with these motherf*in' ants in this motherf*in' office!"

I don't want it to sound like I'm overrun with ants. They're just here, and they're irritating. Every once in a while I'll see one of the little buggers crawling across the wall or nosing around on my desk. I believe there may be one living inside of my keyboard right now (my work computer's keyboard...those little bastards better keep away from my precious MacBook). I kill them, but they keep coming back. As a side note, I feel bad every time I kill one of them, or any bug for that matter. Just thought I'd mention that.

Anyway, I've been around the block a few times. I've had my share of encounters with ants. This one's different. Normally, ants tend to be making their way toward food or some sort of sweet garbage. These guys seem to want nothing more than to crawl across the walls and desk. Also, most ant attacks consist of a line of ants pouring in from an outside location. I remember one summer I was working at a theater and I had practically an entire ant colony come in to my dorm room through a hole in the wall and crawl all over my bed. I can't figure out for the life of me where these ones are coming from. There no line of ants by the windows, the doors, or any of the seams in the wall. It's just single ants that randomly appear nearby. I somehow find that more disturbing. It's easier to deal with an any problem when you know where it starts. I'm not prepared for mystery ants.

UPDATE: I just found out that we are apparently being kicked off of the studio lot (not just my department, all of my company), and we're going to be getting new offices. Don't know where we're going, but hopefully the ants won't follow. Not looking forward to a long commute, though.