I'm looking for any insight into live-betting for MLB. I've spent the last 8 months developing a simulator that I've backwards tested against vegas closing lines. It does extremely well. I'm sure it would do much better against weaker in-game lines.

Specifically, I'm interested in any feedback regarding these questions:

- Is there any place that tracks historic live-betting odds? My guess is no.

- How fast would would sites (I'm US Based) cap wagers?

- How frequently do sites allow betting? I'm sure it's variable, but looking for general ideas. Every pitch? Every batter? Every half-inning?

- Does anyone have experience with Betfair's exchange for MLB? I've heard the liquidity is not good, but just curious if that's a viable option (ignoring the fact that they won't accept US customers).

- Are there any other exchanges worth looking into?

- How variable are the odds across sites?