I have created an icon for iEx. Feel free to use it yourself.
http://www.ewtoo.org/~matt/forums/iex.ico
I have successfully used Resource Hacker to replace the icon in iEx 0.2a and it looks pretty good.

In Resource Hacker, load iex.exe, open up the Icon folder, go to icon 1, right click it's ID number and choose replace icon, find iex.ico, click ok, save the changes and you're done.
enjoy.
Aqua-Soft Forums