The Tarptent Contrail (24 oz.) has been very popular on the various long-distance trails for quite a few years. It's a roomy solo tent; I have a friend who also keeps his pack and his 50-lb. dog inside. Tarptent (they are a sponsor here--click their label above) also has several other good solo tents such as the Moment (already mentioned), the 1.5-person Rainbow (32 oz.) and the new, double-wall Notch and Stratospire 1.