In my .bashrc, I added the following alias for the Opera Mobile
Emulator (on Mac OS X)
alias emo="/Applications/Opera\ Mobile\ Emulator.app/Contents/Resources/Opera\ Mobile.app/Contents/MacOS/operamobile"
The benefit is that I can type plenty of things for quickly starting an emulator of my choice. For example, I can type in the shell
\
emo -fullscreen -windowsize 1280x800
which will starts a fullscreen version of the Opera Mobile emulator for the macbook window size. There are plenty more options for the command line, you can explore them by clicking on the Help button when you start Opera Mobile Emulator.