Is there, by default, a place I can check for any errors that a web start launch may have caused. My web start app displays the web start splash screen and then disappears. This could be for any number of reasons, but I would like some output of what happened. any .log files created anywhere?
Yes, it depends on the version of Java (and webstart) installed as to where the options are to be found. Java 1.5 webstart has changed things compared to 1.4.
In 1.4, you can choose to log (and optionally specify a location). 1.5 does something similar. If you are using windows, you can have a hunt around for a log directory in your C:\Documents and Settings\XXX\Application Data\Sun\Java\Deployment directory for a log directory. The files in this directory can sometimes be useful.