Connecting the ICamView to ZoneMinder is not as simple as you might hope. So I set about writing a proxy application.
This application sits on the box running zoneminder and provides a proxy between the proprietary video port and provides an MJPEG stream to zoneminder. In an ideal world, ICamView would make a complient port, but given their releases of updates it seems unlikely.
The application is fully portable and has been written using C++, SDL and SDL_net extension. I have compiled and tested it in windows and Linux (Fedora 6). There is no reason why this should not work on any other platform.
Below is a link for a page containing an article and source code for a C++ ICamView proxy for ZoneMinder.