Resin is an excellent Java web server.
It's price is good, $500 per server, or free if you are a small business, individual, or pretty much anyone who can't afford $500 for a webserver.
The problem with resin is configuration. Making resin virtual hosts is a tedious manual process. Wouldn't it be nice to have a nice control panel that can manage Resin, just like so many apache control panels.
How interested would people be in such a program? I might decide to write one if there is enough demand for such a system.