As it makes a nice light up decoration, and the Cheertree is still out of action, we should:
Is there an issue for the Cheertree? What's wrong with it?
The wifi shield was not working when I plugged this in, looks like the onboard voltage regulator died (burned out). I've replaced this with one borrowed from @amcewen, although that may be where the original came from too.
Installed in the main room