The other very useful Wifi app is "remote viewfinder"
One usage I can think of is to use it as stealth street shooting. So you view on phone and shoot, while camera is strapped on the neck. No compact, Rangefinder, swivel screen, tilt screen comes close to this sort of stealth...
A shot of shooting the phone with the camera capturing it simultaneously. Extremely cool!
Shooting the handphone shooting the camera remotely by
wonglpnn, on Flickr
Some test shots
Untitled by
wonglpnn, on Flickr
Untitled by
wonglpnn, on Flickr
However using this mode, it becomes auto scene mode, only settings are flash, timer and file size. The rest is decided by camera. Hopefully all settings can be changed in future updates.