This thread is why I love this community s2s2
Don't think I have many articles or material that are specifically great concerning cube design, but I will unload some of my favorites on game design here. Most will be focused on digital game design, but I guess you can filter the content and get some insights taht are applicable to cube design.
David Sirlin
http://www.sirlin.net/
One of my favourite game design writers. Playing to Win is a must read for anyone that has ever played anything (
http://www.sirlin.net/ptw/), though pretty much every single article regarding strategy is great and might be very useful for any cube designers around here.
Daniel Cook
http://www.lostgarden.com
His most interesting article probably being The Chemistry of Game Design (
http://www.gamasutra.com/view/feature/1524/the_chemistry_of_game_design.php)
Mike Birkhead
http://www.flark.net/
Probably my favourite game design writer right now (probably tied with David Sirlin), though there is a lot of stuff that doesn't fit in cube design (like combat mechanics and so forth), but decided to share anyway. He does have a lot of great articles on systems design that might give some insights to cube builders.
Project Horseshoe
http://www.projecthorseshoe.com/reports/
There is always something interesting coming out of project horseshoe. No idea if anything will be relevant for cube designers, though, but Multiplayer Design Atoms might be useful. (
http://www.projecthorseshoe.com/ph08/ph08r5.htm, pretty much a development of Daniel Cook's design atoms)
Also, this might be a very useful article for understanding player behaviour (by Patrick Chapin) and is a must-read for cube designers:
http://www.starcitygames.com/magic/fundamentals/12201_Information_Cascades_in_Magic.html