We actually had an internal discussion about this and we were wondering if we should support this or not. There is no technical limitation and we can eventualy host our binaries on a hostine server - on Amazon S3 for example. The things are getting more complex when we start thinking about licensing and versioning on one side and with corporate proxies which can disable the download of the dll from the particular hosting server.
The second problem is the biggest one and I want to know if you as a application developers are ok to let your users download the binaries from a third party company (from Amazon S3 server for example). can you help us and let us know what will be the perfect option for you that we can provide you with.
We know that this can be a game changer, because the XAP file is becomeing really small when the external dlls are cached so we are taking this feature into very serios consideration.
the Telerik team