I used Alpine Specialty Cleaning for our dryer vents. They had the right equipment and definitely did a great job. A bit pricey for an hour or two of work, probably because they have to cover travel fees. I would totally use them for duct cleaning.
Okay - signed up for Alpine. They're coming this week. :) The quote says it looks like it's going to be about $900+ for 4 hours of duct cleaning for our home (so it's NOT cheap). 'Tis the season for spring cleaning! Thanks y'all!!