It's great to have people to bounce ideas off of. I have seen the alta caps (just recently) they are neat, but not what I had in mind. The flat back buttons (or badges?) are more similar to what I've seen. Though the ones in the link posted look more like buttons and less like an epoxy bubble / poured epoxy. I'm intrigued.
I keep seeing these things.. and I like them. I have been making the bottle caps for a while but I like the idea of having no frame around them.
I'm going to research the flatback buttons more and see if I can come up with a good image of them.