We have launched an iPhone/iPad app.
You can use the app to locate any Brennan B2 or BB1 on the local network.
The app provides search and control of playback directly and allows you to open the web UI for more comprehensive control.
The app saves you having to enter the IP address - which is especially useful if your router changes addresses from time to time.
If you have multiple Brennans you can switch between them.
Search the Apple app store for "brennan" or look here.