That means that 1 BTC = mooncoins (bitcoin mooncoins) or 1 NMC = 100 mooncoins (namecoin mooncoins). They are segregated throughout the whole site and you maintain two different balances.
The idea about the * 100 is to make it easier to bet if you have smaller amounts of coins.
Two different currencies with the same name seems needlessly confusing to me. You already have an exchange on the site, so why not consolidate into one currency: make 1 mooncoin = 1 USD? Then anyone betting on your site is not ALSO betting on the value of an e-currency rising.
Best of luck to you . . .
Interesting idea but I have no intention of starting my own currency.
I will try to make it more clear throughout the site. Thanks for the feedback.
Maybe I'll call them bitchips and namechips.