I followed the Install From Repo instructions for Ubuntu 10.04 LTS that I currently have. Then, I start FreeSWITCH using "/etc/init.d/freeswitch start" after setting FREESWITCH_ENABLED to true in /etc/default/default. FreeSWITCH is located in /opt/freeswitch, so in order for FreePBX v3 to work with FreeSWITCH, I have to move the freeswitch directory (/opt/freeswitch) to /var/local and then soft-symbolically link /opt/freeswitch to /usr/local/freeswitch.

For FreePBX-v3, I am following instructions from here:
DIY FreeSWITCH & FreePBXv3 from LiveCD (I skip down to where it says "/var/www.")

After I do that, I do:

chgrp -R www-data /usr/local/freeswitch/conf/*
chmod -R g+w /usr/local/freeswitch/conf/*
chmod 777 freepbx-v3/freepbx/logs/
chmod 777 freepbx-v3/freepbx/cache/
chgrp -R www-data freepbx-v3/freepbx/config/*
chmod -R g+w freepbx-v3/freepbx/config/*
mkdir freepbx-v3/upload
chgrp -R www-data freepbx-v3/upload
chmod -R g+w freepbx-v3/upload

freepbx-v3 is in /var/www.

So after I do that, I went into FreePBX-v3 setup guide and follow instructions until I get to the Telephony Engine.

I get either this when setting Conf Directory to /usr/local/freeswitch/conf:

Unable to access directory
/usr/local/freeswitch/conf

Or this:

Unable to access directory
/opt/freeswitch/conf

Remember, I set /opt/freeswitch as a soft-symbolic link to /usr/local/freeswitch (ln -s /usr/local/freeswitch /opt/freeswitch).

I also did it the other way around. When I install FreeSWITCH from the ppa repo, I leave /opt/freeswitch alone, perform ln -s /opt/freeswitch /usr/local/freeswitch (/usr/local/freeswitch -> /opt/freeswitch), perform steps to configure permissions correctly, and it's still no go.

I am testing this in a VM, which I've assigned an IP address of 10.0.0.200. I access FreePBX v3 in Windows.

I'm trying to make my installation of FreeSWITCH+FreePBX as easy as possible, but it did not turn out that well in my Ubuntu Server 10.04 virtual machine (even a restart).