Most fitness buffs recommend using a friend or family member as a workout buddy, Qjay. So if somebody close to you can fill that void, definitely go that route first.
I realize how hard it can be to find somebody too. And when you do find someone they're usually not as motivated as you to exercise. They'll often bail on you - I once had a friend who didn't answer his phone until I told him we didn't have to run together anymore.
Posting to newsgroups like the Weight Loss Forum is a good place to start. Just open a thread, tell people about yourself (your city, goals, fitness level) and I'm sure somebody will be interested. Make sure both of you know what's expected of you before you workout with a friend though.
naturalphysiques.com is a good website - not sure if you've been there yet.
You can even make a competition or game out of the whole thing. It's really both buddy's responsiblity to keep each other motivated. So a friend who seems like a fizzle could just need a little more push.
If the internet doesn't work, try a local gym. Join up and talk to a few people, you'd be surprised who is looking for a buddy too.
And your job is another good place to find a workout buddy. You already know these people (pretty much) and you're comfortable with them.
Maybe this will help you out.
