Firmware upgrades, absolutely. They're essential to any modern piece of equipment. The main CPU has both USB and Ethernet interfaces.
As for DLNA, I don't know where I'd do the A/V decoding. The CPUs in the platform are pretty much accounted for, I'd have to add another chip just to handle that. Plus, it feels like something better accomplished by a device designed for the task.
Don't worry about the lack of HDMI inputs. This pre/pro will allow multiple preset states. So it won't assume there's only one possible device behind each port. I had initially planned to only have one input, and require the use of an external switch. But every HDMI input chip already has a hub built into it these days. Still the idea stands, that it'll be easy to switch all available input configuration settings with the push of one button.
