Muddler for 2010 salmon ?

At the moment a few new patterns for salmon and sea trout is emerging in fishing magazines.
Those patterns will probably appear in most salmon fishers flyboxes during the 2010 season, I know of some innovative and experienced people that has been using them for a seasons or so.
In some of the flies I have seen, the fly is built as a “standard” hair wing salmon / sea trout fly, but it is then finished with a muddler head!
The thoughts around the fly is generally that the muddler head is creating a sound in the water and this sound is supposed to be appealing for the fish.
One might think this would mean a floating fly, but you might as well fish the muddler to a sinking or hovering line.
If you fish the muddler on a sinking line, the fly will bee “hovering” and you might be able to fish it better, especially on the dangle or in slow water where you might be caught in weed or rocks with another fly.
This is one of several advantages for this fly.
I have not tried this myself yet but it will be tested throughout this year.
I think it has been used a bit more for sea trout than salmon fishing but this year the muddler will probably be tested hard for both salmon and sea trout.