I started a crawler, but I'm not sure if I will ever finish it completely, so I decided to share it it with you in its current state.
Pictures are too large to upload them here and I had trouble resizing them, so I've created an imgur album instead:
http://imgur.com/a/i1IuF
I'll probably upload more pictures to the album later.
So the story behind it, I wanted a crawler with only one idea in mind, it should look like it has "legs". Wanted it look like something cool, but it is difficult to combine different curves made out of 1x1 and 1x2 slopes, so it started to grow in a totally different way I expected, but I just went with it. In the end it turned out to be a big.... bug

Due to it's size there is not enough room in the editor to make pictures from direct front, side or top view, it fits only in isometric.
Currently it is just a shell, nothing functional inside. It will need a lot of time to finish, which I don't really have now, so I'm not sure about it's future.
Build time... I'm estimating total time spent on it to around 2 days.