FYI - Tucson Free Organic Mulch
I meant to post about this a month ago. For those of you who prefer organic (uncomposted) mulch, this tree service provides it free of charge. They take about a week to two to deliver and dump it on the side of your house. It's a ton. But I love it because it decomposes quickly, weed seed free, and insulates the soil well. I got a truck load about four months ago - it's all the mulch you'll need for the year (or two).