Update, if you run estlcam under wine while allowing the window manager to decorate and control the windows you run into the focus issues I mentioned. However, a workaround is to set your window manager focus settings to follow your mouse (gnome3 users: run gnome-tweak-tool, windows tab, change focus mode to mouse). Its not perfect but it runs and it was usable with some quirks. The quirks I mentioned are sometimes the focus still jumps to the text boxes on the child windows and backspace to undo doesnt like to work (because of the jump in focus) however using the select tool and right clicking on an object allows you to delete previous mistakes easily.
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