Re: [ANN] Sia - Decentralized Storage - Working Beta - Launches June 7th, 2015
Far more people would get involved if a CPU based coin only. And the testnet wallet was working just fine? I don't understand why you would disable CPU mining 
If you want, you can enable CPU mining by using 'siac', a command line tool provided in the release. You're highly unlikely to find any blocks though.
GPUs, even slow ones, are 10x - 50x as fast as the fastest CPUs, even overclocked i7s