I took a quick look at the Gateway white paper, and I have to say that it looks like they are on a good path. Specifying SOAP and REST interfaces should make it very easy for non-embedded programmers to access these networks. I am going to have to bookmark this for future projects. Thanks much.
This has opened so many opportunities, using this feature one can make web servers running in ZigBee coverage area this was information sharing will become very easy even without wifi.
But in the mean time if bluetooth also comes with a gateway specification it will be preferred protocol for mobile devices as it is already having more deployment.
Now that smart grid and home automation is happening it is very important that a Gateway spec. is built for ZigBee devices. Has anyone heard of a mobile phone with ZigBee? I think at home automation, ZigBee will have to have a place in the mobile phones. Will there be problems in bluetooth - Wifi - ZigBee coexistance? I bet. It's my impression that Bluetooth owns much of the market that ZigBee intents to step on. Will ZigBee ever make it... what do you think?