"Java Web Start" for IcedTea

[Rick Niles]

Java novice here, but many website that use Java, for example:
http://adds.aviationweather.gov/fpt_application/

Have a PHP/JNLP file that suppose to be run by something called "Java 
Web Start".

Is this "Web Start" just a simple PHP wrapper to download the JAR files 
and then start up Java?  If so, can it be added to IcedTea?  Is it 
already part of IcedTea and I'm just clueless?

If someone can write a 10 line PHP script that would take it's place, 
I'd love to have copy.  Otherwise, is there any work being done to 
support this JNLP thing?

Thanks,
Rick Niles.