I had a really good weekend breakfast in Williamsburg a few weekends ago at a place called Egg. It's located in Sparky's American Food -- the hot dog place. Seems like the rent out that space in the mornings.
I can't tell you what a good time and what good eatin' we had. Great biscuits, artisinal ham (really!) decent eggs. Totally casual setting and service but it worked.
Don't know the address unfortunately.