I've deployed VStar on my server to test out WebStart enhancements. I've selected the image from the About box as a temporary splash page. I also created a simple icon which can be installed on the desktop, and it also appears in the javaws cache viewer. We'll need to request that one of our more artistic team members create a real icon to replace my placeholder, and to add text to the splash page image.
Click on the vstar.jnlp to see how it works. Than you can use javaws to remove it.
I've tested on Solaris and XP. One odd thing is that the splash page does not appear when I first install, but does on the second attempt to launch VStar. This needs more testing, but I would appreciate if anyone could take a look on other platforms.