I was under the impression that it was a program bug in nero that limited volume label length to 16 characters. But I just burned a compilation with Sonic Recordnow 7.2 that cut a 30 character label down to 16 (without telling me before the burn of course).
The only way I have ever gotten longer volume names is by dropping joliet and using the base ISO file system that limits file names to 8.3 and the volume label to all caps and no spaces. (this is basically what is used for VCD and DVD-Video projects).
So are there any programs out there that support long volume labels under joliet, or is this an actual limitation of the joliet file system?