I think this is a great idea and could help a lot for those who has limited possibilities to try different synths out. I know it is a new thing, and development lasts for a while. Do you think there will be service available for Mac users as well?
You are right, development takes time. My next goal was to create VST (for Windows) and AU (for Mac) plugin versions of the client so that you can at least play the synths with a Mac, and I have already started this. After that I will try to do the host software also for the Mac.