Wow. The three of you are obviously serious about this.
I have been looking closer at the Hue API that is available and I don't see any problems making a plugin, but it would be nice to know if anyone else other than the 3 of you wants to contribute!
I should be able to put together a basic plugin very quickly, but if there is enough interest I think we can go beyond the basics. The basics will be simple actions to set the HSB (hue, saturation, and brightness) of either a light, a groups of lights, or all lights. It will also be easy to make alerts where a light(s) will flash for a short period, or initiate a colourloop. These are basic extensions of the existing api and you can probably do it already with the command line tool, though this should be easier and might be slightly faster with a VC plugin.
Moving forward it should be possible to set up schedules (I think) and maybe do other things like "store" and "restore" current lights. So for example if you wanted to do a "red alert" when motion is detected at your back door, you could
1) Store current settings
2) Initiate red alert lights flashes for a short period
3) Restore settings back to what they were before you initiated red alert.
I am still confused about schedules and can't really tell you what will be possible there, but obviously you can always use the GgCal plugin as the scheduler and use it to initiation a lighting schedule that way.
I don't think that the Hue bridge can actually store "scenes" but we could possibly create a database of scenes within the plugin, similar to the store/restore but with naming and saving the current state and then being able to restore it by name later. This type of feature would probably come later if a plugin were made.
Anyway it looks like a nice system. A little expensive but fun. Hopefully there will be other users who are interested!