I recently placed an order for a felt game mat from Hotz Mats, the same folks who also produce the fine Whitewash City cardstock buildings. I've gone for one of their Small Town Western Mats.
It's approximatley 72 x 45 inches (183 x 114 cm) and I've gone for the double sided option with the other side having only the rock scatter pattern. This will be fantastic for Gutshot, Six Gun Sound and Wargods of Aegyptus. It will also be quite useful for WWII games if I ever get some Afrika Korps sorted. It's still a good 3 weeks away so I'll post some photos once it arrives.