Thanks to all who posted (Omatako, Northeaster, Bubb2, Davekanelavie), you were right on! Barnacles!
Although it will cost me the price of a quick haul and scrape, I'm very happy to find it was nothing serious. As I stated, its only been in the water for 10 weeks. My marina guy told me they coat the prop/shaft with a spray on anti-fouling agent but didn't know the name of the product. He also said this year has been a bad year for barnacles in my area, he's had to haul quite a few boats. I'm going to have to try somehthing new next year and I'll have to try to use the boat more so those critters won't be able to hang on as well.
Here's what I found this morning.
Those critters must get dizzy!
The bottom paint didn't look bad at all. Was redone this winter.
I told my wife, we'll just have to use the boat every weekend. It will be cheaper to try to keep the barnacles off a spinning prop than to have to have it hauled now and then.