I think there might actually be a bit of a scope for some public-side web development that interfaces (indirectly!) with the avionics. Some other launch providers do animations based on vehicle telemetry once the vehicle is out of range. Last night, SpaceX just showed a static image. Given that there's a lot of interest in their webcasts, I imagine they'd like to do better at some point...

[Edit: kind-of wonder if they're using a certain amount of in-house webapp stuff for mission planning, etc., as well]