More info here...
Viewing the source at localhost:8080/Twitter/ reveals that the variable is still set as "Desktop View" even if I'm on the iPhone view when I run it. So I removed Desktop view from the project and ran again, works perfectly. It's even retrieving the data from twitter and displaying it in the list.
Also, when I run the Sales Demo (as downloaded from the tutorial) the horizontal/vertical radio buttons aren't shown.
Apparently the Sales Demo is not pulling the info from the database?
For best results, use the Firefox browser..