Hi
The ISO will remain current for a long time.
The only reason for replacing the ISO would be where we wanted to add more RPMS for the base install, to change the look and feel of the ISO install, where we wanted to use a later kernel, or when yum updates get so huge, that we would want to pass them on up-dated.
Having said that, there are always questions like - "will this install on <insert your fave linux distro here>"
So if anyone has a favourite Linux OS, and wants to have a go...
You would need to start with a server install, using Apache2, MySQL5, PHP5, and some development tools. The install script would need to be modified to put things in locations appropriate to your OS, then it should just work! The script compiles from source, rather from RPMs
Yours
JJoe