Hadn't given any thought to the pronunciation, but finding a suitable and available extension with the wide variety of applications out there can be difficult, and I am not sure 'spr' should actually be the final choice - the spr is a shorterned form of "scribble protocol".
However really the 'scribble' part is not necessarily relevant - so maybe the extension should revolve more around what it represents, i.e. a protocol.
Once we have decided on the final extension, then it probably would be a good idea to register it.
Any thoughts on a good option? Do we need to stick with the traditional three letter extension?