Here is a page I threw together on how to use a home made bathbomb mold to create nice bathbombs. I was unhappy with any molds I could find online (with prices over $300.00) so I made my own. And it works pretty darned good :)
I recently made another mold, and it turned out even nicer than the first one. I think I will sell them on e-bay but may not, as the amount of labor that goes into one would make them a tad pricey.
I have made a press that uses the mold. I will have to take some pictures and post them. It makes making bath bombs much, much easier.