Well, I tried installing it, following the instructions on the wiki, and think I'm having the same issue you are. It doesn't give any error messages when trying to start, but it doesn't actually start. The only log I'm finding is in /opt/openfire/logs/nohup.out, and the only contents of that file are
nohup: failed to run command `/opt/openfire/jre/bin/java': No such file or directory
However, /opt/openfire/jre/bin/java does exist and is a binary, but it doesn't appear to execute:
[root@e-smith bin]# file java
java: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped
[root@e-smith bin]# ./java
-bash: ./java: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
This makes it look like, for whatever reason, the JRE packaged with the RPM doesn't want to run on SME 9 (i.e., CentOS 6.5). Installing a compatible JRE should take care of this issue, but I'm not sure what others might be raised. I may look at this further when I have some time.