The number of services offering real-time APIs is slowly but surely expanding and it looks like we’re going to have to add quite a few more. Since the start of the year a new type of service has started to appear–client push services, which help developers include real-time updates in their web apps. Real-time client push APIs have actually been around for quite a while (around 10 years) as they are shipped with Comet servers but only recently have these been moved into the cloud and off...
