Share 'Posting e-Books For Sale - Is It Worth It?'

e-Books are rapidly gaining in popularity with some thinking they are the wave of the future.   I have five titles on Amazon Kindle and am thinking of also adding them to Barnes & Noble's Nook e-Reader, as well as iBooks and Sony Reader.  But I'm wondering if it's worth it since it is time consuming to do so. And wonder if the others have nearly as much traffic as Amazon.   I wanted to see if…