Resources
Worldbuilding
Constructing an SF Universe"What's needed to build a world?" - a good checklist with questions that can help flshing out a world.
Starmapping
3D Starmaps by Winchell Chung. The definitive howto web-guide.Mapping
Wilbur - a terrain modelling program.World Builder - a planet modelling program with continental drift and climate simulation.
Xenobiology
How to design an alien by Jack Cohen, from New Scientist, 21 December 1991, Vol.132 No.1800 Page 18Principles of Planetary Biology
Technology
Inflating Lorentzian Wormholes by Thomas A. Roman (Phys.Rev. D47 (1993) 1370-1379) - the "factual" basis of the higgsram drive.
Foresight Institute - Nanotech policy think tank.
We, Borg by Anders Sandberg - maybe some ideas for Unity.
Posthumanity - some ideas about posthumanity.
Economics
Encyclopedia of the New EconomyCulture
China the Beautiful - useful material for Penglai.Language
The Human Languages Page Language Construction Kit - excellent advise on how to make your own languages.
Basic Interlingua Course - while the lingua of Arcadia is not strict Interlingua, it can be an useful inspiration.
Auxilingua - Interlingua and other constructed languages.
Online Dictionaries - Many languages.
Indonesian and English Conversation
English-Chinese Online Dictionary
Remember that Babelfish can be used to translate into Spanish/Portugese for the Victorians.
Philosophy
Transhumanism resources - a lot of resources that can be useful for this setting.
The Internet Encyclopedia of Philosophy
Nicomachean Ethics by Aristotle
Inspiration
CONTACT: Cultures of the Imagination
Epona, a well designed planet orbiting around Tau Ceti. (see also the Hanly gallery for more pictures).