Most useful language for pen testers to learn:  

C, C++, C# 
116     42.2%     
 
Perl, PHP, Python
83     30.2%     
 
Assembly
25     9.1%     
 
Java, Javascript
23     8.4%     
 
VB, VBScript
22     8%     
 
SQL
6     2.2%     
 

Number of Voters   :  275 
First Vote   :  Tuesday, 06 February 2007 16:14 
Last Vote   :  Tuesday, 06 March 2007 10:13 

It's not really a dying language, the poll was on the most useful language for penetration testers to learn. Apparently HTML isn't as important.