Was wandering around a farmers' market last week, munching on a bunch of radishes, when I met Joe Hollick of Pair-a-Dice Farm in Lunenburg, VA. His booth had a selection of dyed yarn spun by Dawn Hollick.
I immediately asked if he had roving for sale.
The Hollicks sell roving. While Joe did not have any on hand to show me, he did present a binder of photos that showed how they process the wool. They scour the wool in a dedicated machine, use a manual picking machine, put the fibre through a small industrial drum carder, and spin on (what looks from the flyer close up) a regular treadle-operated spinning machine. You can see the same presentation of their processing online here.
I hope you can see the range of dyed colours available:
And in other farmers' market and Community Supported Agriculture (CSA) news, I hear a rumour in the blogosphere that fibre CSAs are available. Think of it! Sign up for fibre and have it delivered just like a vegetable box scheme. There's at least one listed on the Local Harvest website.