I use 5-gallon nylon pain strainer bags (which I picked up from Lowe's or Home Depot) exclusively. They cost like $1.50 a piece, are reusable, easy to clean (give them a rinse and let them dry - once dry, the rest of the grain and hop particles will dust right off) and do a great job as either grain bags or hop filters. They also have 1-gallon sizes.
Edit: For hops, I just stretch the opening of the bag over the lip of my brew kettle, throw some stainless steel washers in the bag to weigh it down, and then add my pellet hops in there. That way, they get plenty of agitation but can still be easily removed.
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Planned: Dark Mild w/ 002, Dark Mild w/ 028, sLambic II, Flanders Red II
Primary: Fat Man Porter w/ 1469, Fat Man Porter w/ 005, sLambic I
Secondary: Orange Blossom Mead, Flanders Red I
Kegged: Centennial Falcon w/ Conan, Centennial Falcon w/ Denny's, Barrel-aged Fat Man Porter, Belgian Dark Strong, Huell Melon Pale Ale
Bottled: Flanders Red I
Last edited by ArcaneXor; 04-09-2009 at 07:12 PM.