I believe that biceps can be worked much more frequently than once a week.
It is well known that different muscles can recover at different speeds and respond to differnet types of training. I've been having problems with my biceps and am starting this routine:
I bought some 45 lb dumbells and some elastic bands so I can do a little working out at home. Im going to try doing 2-3 sets of 10-12 reps every other day. I believe that defferent muscles recover at different speeds, for example, calves and abs can be done every day. I think that biceps might respond best to every other day workouts. Im thinking about doing dumbell curls like this every other day in addition to my 2 major once a week workouts:
Chest/Shoulders/Tris
Legs/Lowerback/Lats (lats could be on a bicep day, unless I do only pullovers)
I'd just like to experiment a little with something different. Maybe I can build up some decent size bis while I work on my strength for my major lifts.