In the very same day I had a working prototype of a slot machine, where you could buy credits to play with MEO Wallet. In the next day, we deployed it and added a redeem feature, so that users could cash-out after a jackpot.
Well, I decided to reuse some of the code that we did at Codebits to develop a generic MEO Wallet API Client. It was designed for .NET 4.5, uses HttpClient and has a demo project that you can play with.
Check it out: https://github.com/danielbcorreia/MeoWalletDotNetClient