I think that initially Casey is going to be quiet and "good" because she is going to have people looking out for her, helping her, and advising her--the DT and the distant family of CA in Houston that I now hear she is going to move in with.
I really can't imagine her agreeing to do an interview right now unless there is a promise that it will consist of only softball questions (so, perhaps something with Geraldo, then). I mean, what could she possibly even say in an interview at this point? Would she maintain that GA did it? Would she claim that it wasn't Caylee's body in the woods and that she's still alive? I know a lot of media types would probably love to get her in front of their microphones, but I just don't see her doing that yet.
In truth, I don't see Casey becoming terrifically wealthy off this. I think any money she does make will be money she gets second hand--perhaps through deals that JB brokers for her or from money CA makes (if she agrees to share).
I also think that after a few years she will grow tired of being quiet and "good" and that is when she will trade in on her infamy--the public will have largely forgotten her, the animostiy will have died down, and some people will be eager, at that point, for a look at how she's doing, what she's up to, etc.
That's when we'll see the centerfold in Playboy or Hustler, that's when we might see some interviews and/or TV appearances. I can see her trying to cash in on some online venture, if TV won't have her because they still consider her too "risky." Even if a US producer/show won't work with her, however, I can easily see a European show of some sort (whether it's a simple interview, a reality show, or something like that) reaching out to her at that point, however. (Wasn't it a European show that eventually did the interviews with OJ when he made that awful Psycho/stabbing "joke"?)
As far as GA and CA--I don't think CA will ever accept the truth (whatever that might be). She will attempt to control this story (even if she can no longer control Casey) until the end of her life, which is why I do expect to see a lot of interviews and at least one book from her after a "tasteful" period of silence. (Ahem.)
I worry about GA for the same reasons many of you do, but if he stays with CA for the next year or so, I think we'll know that he's back to drinking CA's koolaid.