The Nexus meets Orion's Arm

Something that always bugged me a bit about the G.U.N. is how underdeveloped key areas of their technology seem, given that it is set a millennium in the future, like computing, nanotech, and biotech. The G.U.N. seems to be deliberately keeping itself on the threshold of an intelligence explosion.

I am a big fan of Accelerando, Quantum Thief series, and Orion's Arm. Part of me wonders how badly the Nexus would react if instead of meeting G.U.N. on the other side of the portal, they met a truly post-singularity human society, Transcendent Humanity would be a good model. It would be the mother of all out-of-context problems.