Everywhere I look I see businesses using Cisco, Tandberg and Polycom video conferencing and that means real H323 protocols and software. Of which there is NOTHING for linux.
Have you tried Ekiga (formerly GnomeMeeting)?
https://blekko.com/ is an example of a competitor which has its own index.
Can you provide citations for this statement?
Perl has some nifty frameworks that can make you as productive as PHP for small web projects, and it also does large projects well.
But hey, if you're comfortable with PHP and Java, and want to pay to have your app completely rewritten, then more power to you.
The only way to learn a new programming language is by writing programs in it. - Brian Kernighan