The logo is going to be placed on the top of the uploaded example designs, where the word "Dashboard" is currently placed.
Its important that the design of the logo blends properly in with the rest of the webpage.
You are allowed to modify a bit the layout of the black strip at the top, but do only so if it is essential for the logo design.
Of course we will use the logo in a landpage and for advertisement purposes.
For the pictorial element, try to play with the word Cast and Mill, where mill makes reference to a windmill. You can also get inspiration from wikipedia: http://en.wikipedia.org/wiki/Mill
We like the contrast between a very high tech web application and the honesty and classiness of a vintage windmill. We want to convey the idea of an advanced tool but at the same time that it is easy to use and not intimidating.
I will give daily feedback to lead you in the development of the logo.
Contact me if you need more information and inspiration.