What are those tracks in the Perseus view linked in the article? An intergalactic dust-swept highway? A slash and a dot?
http://www.uploadgeek.com/share-8FEE_4BD68D73.html

Quoting wikipedia:
Jupiter brain

A Jupiter brain is a theoretical computing megastructure the size of a planet. Unlike a matrioshka brain, a Jupiter brain is optimized for minimum signal propagation delay, and so has a compact structure. Power generation and heat dissipation are formidable concerns for a Jupiter brain implementation.

While a rigid solid object the size and mass of a rocky planet or gas giant could not be built using any currently known material, such a structure could be built as a low-density lattice with a mass comparable to a large moon or a small rocky planet but a far larger volume, or as a solid but non-rigid structure with the mass and density of a planet (as long as the internal heat gradient is carefully controlled to prevent convection).

http://en.wikipedia.org/wiki/Matrioshka_brain