What have you invented or what problem needs an invention to solve?

I have invented nothin but the world needs cheaper soltion to convert the sea's hard water into normal potable water.

A couple of years ago, I thought I came up with the idea for internet jukeboxes that can download music. Then I started seeing them around soon thereafter. If only I was a little quicker...

Will tell you one old old idea, which would highly interest me. An old car radio station saver on book-self stereo radio. So when it is turned off than it stops using power.

Something that automatically deletes copy-cat questions on Yahoo Answers.