Check out our supply of Stonehedge Shepherd's Wool.  It's 250 yards to 4 oz, and is really happy at 5 sts/inch on a 7.  Yes, it's a light worsted.  We knit up Mailin, a pullover by Isabel Kraemer, in 5 skeins and it is lovely.

worsted sweater wall

That is Oban in the cream Cumbria, Mailin in teal Stonehedge, and Kahlua in a beautiful taupe called Meadow of Harrisville Watershed.