Here's an organisation that might make a good poster-child for bitcoin charity :www.spaceguarduk.co.uk
UK CHARITY number : 1143257 - SPACEGUARD UK
THE AIM OF SPACEGUARD UK IS TO PROVIDE AN EDUCATIONAL, SCIENTIFIC RESOURCE AND INFORMATION HUB SPECIALISING IN ASTRONOMY, WITH A UNIQUE EMPHASIS ON THE DETECTION AND CHARACTERISATION OF POTENTIALLY HAZARDOUS SMALL SOLAR SYSTEM OBJECTS.
THIS WILL BENEFIT THE CHILDREN AND ADULTS OF KNIGHTON, POWYS, WALES, THE UNITED KINGDOM AND THE REST OF THE WORLD.
Go to the website and look at Project Drax , which is working towards getting a 24" Schmidt Camera running. They are accepting donations in all the standard ways, but I think that they might be very amenable towards Bitcoin.