I forgot about this thread.
The EL wire inverter does have a high pitched whine but it is barely audible to me and I couldn't even hear it when it was installed in the case. Unfortunatly it was less than impressive for lighting my window. Taken from my build log:
I wanted to try to light the window with EL wire in hopes it would give the window a more even glow and not throw a lot of extra light around the case. Well I just did a quick and dirty test of the EL wire by taping it to the edge of the window with electrical tape and its not impressive.
Its far dimmer than the cold cathodes. Even with all the lights off the effect is barely visible (the above picture is from a timed exposure). It definitely gives an even glow to the etching but its just too dim. I do recall seeing some high intensity EL wire some where so maybe I'll give that a try.
Keep in mind that the above picture is from a 4 second exposure with all the lights and monitor turned off. With my monitor on the effect is barely visible. Right now I'm looking at SMD LED strips. I have a couple on order which I should get in a week or so. After I get this window etching and lighting nailed down I'll post a FAQ for others who'd like to do something similar.