Thanks for all the responses. To Evodawg's question about the leak, it was
leaking at the shutoff valve. The toilet was old and nasty, and we're
replacing it anyhow, so there should be no more leaks. The surface is
pretty stable since its just a two-by-four subfloor over the slab, which is
in good condition. The plywood floor is rotten from the leak, however, so I
may just replace it with 1/2 backer board. BTW, what is the protocol for
pictures on this board? Is there an a.b board that most people use, or just
post a link to pictures on my own website?