Not sure if anyone is still interested but just in case. I gave up with the Raspberry Pi and went back to a mini ITX Atom board.
Basic install is as follows. I can provide more details if anyone wants them.
To install Lamp I followed this thread until the finish of installing Php.
Beware some of the lines marked as older versions still need to be run. ie restarting iptables and Apache.
Then switched to this doc to install the remaining packages
I have moved my document root to a different partition so needed to up date Apache with that info by editing it in /etc/httpd/conf/httpd.conf. There are two places this needs to be done.
The document says to allow overrides for all of the root but I added a new Directory entry for the OwnCloud directory and set it in there. I didn't do ‘a2enmod rewrite’ and ‘a2enmod headers’ and still am not overly sure what they mean.
Create the data directory and change the owner on it and apps and config to Apache.
The biggest issue was the SELinux context but found that
sudo chcon -t httpd_sys_rw_content_t filename
works. Do it for data, config and apps.
Make sure all parent directories are owned by root and owncloud is owned by Apache.
This was a lot of testing and messing around so I may have missed something. I am now using OwnCloud with no apparent issues.
Next I need to determine how secure it is before I open my server to the internet.
Any questions let me know.