Those rubber brushes are great and you get them as longhandled brushed too. I have always picked them up cheaply from oundstretchers and places like that. I have also got one of the pet hair magnets that I got in PAH a few years ago but I don't remember it being that expensive. It is great for the inside of cars, mats, stairs etc.
http://www.petsathome.com/shop/pet-hair-magnet-by-petmate-15450Just realised you want it for clothes, don't think it would be that effective on clothes but would work great on cushions.