Create a wi-fi spot using airport to share your 3G mobile broadband dongle!
This is a lot easier than you may think.
First of all: -
Click on the apple icon (top left of your mac desktop)
Select system preferences
Select the sharing folder under internet & network
Select the internet tab
On this screen you will see a line that says “Share your connection from:(your mobile broadband device)”
Check the airport box from the list below that line.
Click on airport options to setup a password for your wi-fi spot.
Check the wep password box
Select a 5 character password
Press ok
Now press the big start button.
Thats it!!
Now you have created your very own secure wi-fi spot from your mobile broadband dongle.