Check out this cool concept from designer Mikhail Stawsky, the Bluetooth Umbrella.
It features a touch screen display so you can make and answer calls. There is also a speaker and mic built into the handle, so you can talk on your mobile phone whilst using the umbrella.
It also features a built in radio so you can listen to music, whilst walking along in the rain.
This is a great concept, the only problem I can see with it is that the people around you in the street will be able to hear your conversation.
via Yanko Design