@Vaughano I agree with you however the limitation on the OpenSprinkler was memory. That has been resolved in hardware 2.0 and hopefully Ray can incorporate this feature now. Also, Dan has added this feature into the OSPi which is functional however my web app cannot use it yet and I am holding off until there is a compatible logging system in both versions.
@wyone The desktop version will work just as well as the server version! Use what is comfortable since it will help get you up and running quicker.
Also, the hosted web app might not be working because you need to use your routers WAN IP. To find this goto http://wimi.com. Another requirement is port forwarding the port used by the OpenSprinklet. For more information consult this guide: http://www.computerhope.com/issues/ch001201.htm