I am working with Ficus religiosa, and a plant germinated that at first I assumed to be Ficus religiosa, but now I am sure its not. It recently sprouted a small white star shaped flower with a yellow center. The Ficus seeds came from Australia, and so far I am unable to ID this guy. The plant is only about 5 inches tall, and already producing flowers. Any help here?

Some type of Solanum sp. but I'm not certain with the species.

I agree, Solanum of some sort but I don't know which species either. A couple with photos for comparison:
Black Nightshade (Solanum americanum)
Black Nightshade (Solanum ptychanthum)

Solanum Chenopodioides is found in Australia.