Here's a link to the "Ask A Vet" forum: http://www.medhelp.org/forums/Animal-Health---General/show/112
If your dog had been bothering the ear and had knocked the scab off himself, what you might be seeing on the ear now is a hematoma. A hematoma is like a blood blister that commonly forms within the ear pinna when there is a continued insult to the ear. Ears are very tender and the dog's claws can really irritate it if they continually bother it. Aural hematomas are normally the result of an infected ear canal because the infection causes pain and itching and makes the dog paw and scratch constantly at the ear. Sometimes, if the ears are sensitive enough, even a vigorous shaking of the head can cause an aural hematoma but it is more often due to some type of injury with continued bothering by the paw. Normally these hematomas go away but sometimes if they are large enough and slow enough to heal it is necessary to place a suture every couple of centimeters around the area of the hematoma, creating like a quilt to lessen the size of it and make it difficult for it to continue to fill up with blood. The hematoma usually heals within a couple of weeks and hopefully the problem is gone.
If this is what your dog has, what you first need to do is have the vet do a complete inspection of the ear canal to make sure there is not an infection in there that made him worry at the ear in the first place, otherwise the healing of the hematoma is going to be delayed because the root cause is still there.
Also, to put your mind at ease, when I went to get you the address so I could link you to the Ask A Vet forum, I saw your post over there, so hopefully one of the doctors will be responding to you soon. :) Please let us know how your dog is doing.