What do the moravecs (humanoid machines from the Jovian system) look like in Dan Simmons' Ilium?
I am halfway through the book and haven't seen a good description yet as to their appearance.
As you noticed, the novel is a bit short on specific descriptions. Little bits here and there. For the two main moravec characters:
The moravec was not designed for walking — his role was mostly to sit in an exploration submersible, sometimes to swim — and when he grew tired of being a biped, he altered the workings of his joints and spine and padded along like a dog for a while.
- Ilium, Chapter 22
These images might be a start...
Ultimately they look like almost anything your imagination can come up with :)
If I remember rightly they're named Moravec's in honour of Hans Moravec a researcher at the Robotics Institute at Carnegie Mellon University, who has published various books about the future directions of robotics, transcendence and other related stuff.