To quote an old book: "That which has been is that which will be, And that which has been done is that which will be done.

So there is nothing new under the sun."

More than likely, there is no app that hasn't been done. There are only ones we don't know about.

An idea on the front page of ideaswatch.com looks pretty easy and useful -- bill splitting for roommates.

It has of course, already been done. It's too obvious to have slipped through the cracks. But if you want to build something small that'll help lots of people who need help -- that would be a good one to tackle.

There are plenty of other good ideas at http://www.ideaswatch.com