From an end-users point of view, taking into consideration the eventual printing of the piece:
Include as many variation of software that you can possibly provide.
Not all buyers have Photoshop or Illustrator or InDesign.
.psd, .indd, .eps, .doc
Some have Word only.
So if you included those 4 file formats, it should increase your potential for more sales.
try this for a starting point: http://mozainuddin.deviantart.com/art/iOS-7-Game-Center-App-s-icon-PSD-ai-377327320
It’s not perfect, but it is a pretty good starting base.
What happened to the Front page of PhotoDune?
The images are not showing properly and there’s no categories.
Maybe they want Zuckerberg to buy them for 4.2b
He’s a sucker for deals!
Hide my wordpress – I’ve had some sites hacked, this seems to work well.
That’s an UpBeat Jingle.
Also, you cannot say “Super Bowl” that is a Trademarked name.
Try Big Bowl, Super Ball, etc., etc.
Now it’s pretty minimal, add some date, some fake team names etc., etc.
More Info text above center area and spice up the bottom area.
My opinion. Good Luck!