With the optional web or iPhone sharing, you have always direct access to your Merlin projects, practically from anywhere. The Merlin iPhone app is as intuitive as Merlin itself, should you however like to read more about it, you may want to download the Merlin iPhone Quick Start Guide.
Please find hereafter the answers to the most frequently asked questions:
When can I use Bonjour?
Should you use Merlin iPhone app within your own WLAN, you do not need to know the IP address of the machine publishing the projects or to enter this when wanting to access them. Merlin iPhone will find Merlin “server” via Bonjour and list their published projects automatically.
How can I sync my projects not being connected to my Wi-Fi?
When wanting to sync your projects and your iPhone has currently an EDGE or UMTS (3G) connection to the internet, you will need to establish a connection to your network using the external IP address of your router. If the router supports UPnP, it will then automatically forward your requests to the publishing Mac. Please read here some troubleshooting info, in case you router does not support UPnP.
You can also use DynDNS or a similar service, making things easier to access a dynamically generated IP. Please read here for more information.
Update: New question added…
I can see the publishing Merlin mac listed as a server (over Bonjour) on my Merlin iPhone but cannot connect to it
You should check the firewall settings of your mac and in case firewall is enabled, you should allow incoming connections for Merlin or Merlin Server.