gonelong, my wife's company here in KC used to have a service like this that came around the employee parking lot while they were at work. Then one of the employees checked his oil and discovered that the company hadn't changed it at all.Savafan, there is a service that a few people at my office use. They come out in a van and change the oil right in our parking lot while your inside working. They seem very professional. They call a few minutes ahead of time and you walk the keys out to them. They call again and you pick up your keys. If I recall correctly, its quite a bit less expensive than the Jiffy Lube type places, though I don't know how "full service" it is ... if they check belts, hoses, fill up all fluids, etc.
I guess that could be an issue with any oil change you get anywhere, though. You should always check your fluids afterwards.