It's a subject that would interest me but as mentioned above,I'm not certain that it would generate enough interest for giffgaff to consider it worthy of it's own sub forum,but hey,I could well be wrong.
There may be a way to get the ball rolling though and see how things go and how many people get involved.
The problem with GD is that threads get lost from the first few pages because they get swamped by the never ending "good morning","good night" and "what shall I have for my tea?"threads which are equaly as entitled to be there so perhaps you could start a dedicated science/tech thread and ask the community team to sticky it in GD for a while so it's easy for people to find and return to.Then,if it proves popular enough maybe giffgaff would decide to find a dedicated space for it.
Not an perfect solution but it would be a start.