I skedaddled over to Hancock Fabrics for some pocket twill at lunchtime today and found their polyviscose suitings on sale at 50% off (regular price is $7.99/yard)! They don't have a big selection, but I picked up a nice purple plaid that I've been watching for a few weeks as well as the ubiquitous Black Watch.

I don't know whether this is a nationwide sale, so YMMV.