I didn't make that ship, it's from the SE4 Army of Darkness set, that's just how I always imagine them, rectangular with sensor spires, but with a vaguely organic look.
Edit: A new book came out a few weeks ago. Aliens with STL city ships discover the allies but consider them unintelligent because they communicate differently.
http://www.amazon.com/o/ASIN/1416520...226699-0228445