I have FINALLY been indocturned into the werewolf clan!!!
YESSSSSS!!!
Welcome Brother. I will be your shield brother
Just as an FYI...
To test, I contracted the disease to become vampire. Made it to the first stage, and then finished the Companions quest line to become werewolf. The werewolf form overwrites/cures/removes/whatever any hint of vampirism. Didn't test it with a full-blown final-stage vampire, but I'd assume it would do the same.
I do not think you can be both.
So with the ring of Hircine, do you have unlimited transformations or just 2 perday? strategy guide says 2, but wikia says unlimited.
Now I have read the Skyrim Wiki's on this there is two Statements.
First one.
Refers to Ring of Hircine,
Link
This one states an additional time per day.
The other.
Refers to Cursed Ring Of Hircine
Link
This seems to state it dose it its self randomly with out your control.