This information is available in the data dump and through the API, but in a sense it's still far less "available" than being able to see the information on every post at any time. I believe there was a performance argument for not allowing this function below a certain rep threshold (maybe Jeff can give us some numbers on that).
As Jeff said here, he thinks this should be an ability you earn (I can see both sides to that).
I think it would be most useful in the form of the feature-request to allow < 1000-rep users to view the voting split on their own posts. That would satisfy this request in a meaningful and useful way, while not negatively affecting database performance too much.