I saw a remark somewhere by a print book author who said 3D covers are
used by eBook authors to make it look like they have a 'real' book. That
maybe true, but I feel it's up to each author or publisher to use what
they'd like to use. However, it's also true that most sites that we'd like
to be marketing or promoting our books on want the flat covers.
So, I use both. I use 3D on some of my web pages and on the first page of
my eBooks, just because I personally like them, and the flats for those
sites that require them.
I use RealDraw Pro to generate 3D covers. It has a book cover template
that's easy to use, and it's the only reason I bought the program. You can
use your own wording and graphics on a flat surface and when you're done,
click save and it automatically skews itself perfectly onto the template.
You next do the same for the spine. Easy. All you have to do is create
30 day trial version at http://www.mediachance.com
DreamWind Publishing Company
eBooks @ DreamWind Whispers