Watchover needs an application icon

Watchover

Watchover is an application that helps Parents to monitor what their children are doing on the computer.

I'm looking for an icon to be used by the different parts of the application.

I'll be using this icon for an iPhone app, and also for Mac and Windows applications.

--- key messages

the icon needs to work both for children (who are being monitored) and parents (who are doing the monitoring). It needs to be:
*friendly
*trustworthy
*reliable
*safe

It should convey the idea of something monitoring/watching

It might use the idea of a computer being monitored (but that might make the icon too complex)

I'm looking for something that is simple and iconic - not too fussy or complex.

---design considerations

You can see my existing apps here
http://hobbyistsoftware.com/iAbout
and here
http://hobbyistsoftware.com/

I'll give a slight preference to icons that are somewhat similar in style to my existing icons; But the most important factor is the quality of the icon as it stands by itself.

You can re-use the chrome from my other apps (attached to the project) if you think it creates a good icon, but this is definitely NOT a requirement.

---size requirements

It needs to handle a range of sizes from

512*512 px for the apple store

various iPhone icon sizes
57*57 px
72*72 px
114*114 px

and really tiny icons for the menubar/taskbar on mac/windows
18*18 px

I'll also be using the icon in the mac and windows taskbars - so it needs to be flexible and self-contained!

this probably needs two versions; the large version with sufficient detail and richness to work at 512, and a slightly simpler version of the same icon for the really small versions.

---- source requirements

I'm expecting to get the full .psd source (or equivalent in your design app)

please feel free to post any questions you have - I'll do my best to answer as much as possible