My advice? Forget about him. You deserve better than that. If he isn't calling you back, he isn't worth it.
You seem very impatient - You state you met him a couple of days ago - thus, it may help to allow him some time to get back to you. Perhaps he has family issues, perhaps he had something planned with friends or family that took him away from home...thus, he may not know for certain that you called and left a message on his answer machine.
I'm not so sure why your co-worker got mad because he didn't call you - and that she called his residence - I'm not sure why you allowed her to take that initiative. Do you not think that this may have a factor in this guy not calling you? Getting someone else involved in a "new" potential relationship - perhaps he was put off by this - after all, he gave "you" his number - why get someone else involved so soon - let alone to be mad?
If you like him - although, you really don't know him, out of common courtesy, you may want to give him a few more days to get back to you - or you may wish to call him again. If not, then it appears that you will need to move forward - however, if you are interested in a working relationship for the future, with him or another, patience helps - for everyone has their own pace and reasons for what they do, why they do it, how they do it, when they do it - yet, more importantly, true, lasting and loving relationships take time to grow.
I wish you the best.
Peace, Love & Happiness,
The Mystic Wave