Float 'n' Anything (bait, jig, fly, soft plastic) works year round, but the method is generally associated with colder water. It works in all depths. I use a fixed waggler float most of the time. In really deep water, I'd rig it slip style. I like a very light jig (nothing bigger than 1/32 oz) with a couple of split shot above the jig.
It's very popular with smallmouth fisherman. You could also do a search over at www.riversmallies.com and www.bronzeback.com -- lots of F 'n' F fans at both sites.
Google should produce lots of info as well.