I used to work at a small market TV station doing camera for this exact thing; the local commercials. Yep, sometimes the salesmen would write the scripts and we'd have 30 minutes to shoot and a half day to edit and they looked like crap, but occasionally we got to spend more time on making something look great.
If you can get in the door, try it out, it's a great way to hone camera skills and you'll make some good contacts that you can use later in the business.
http://www.MediaCircus.TV
Media Production Services
Winnipeg, Manitoba, Canada