Start with one mailing list. We may base an incoming message's rating on the reputation of its author on this topic. Such a variant may be practically implemented with relatively little work, and may bring limited, but immediate benefits to most of the list members. Global information service with more or less fully implemented encryption and archiving features, elements of hypertext and digital 'reputation' cash. Smart people get rich, curious people learn.
Fools stay off-line.
Brain-resident terabit modem with VR interface suggests you the best of global multisensia according to your current interests. Which means the ultimate freedom of choice. Plus global integration of consciousness.