I uploaded an app to my country's app store, and it reached first place in top free in just 2 days!
Well, I am not bragging, since nobody here cares anyway :p
BUT! I think my app deserves to have a picture on the home page (the large image that previews applications in a 600x300 pixel rectangle [the size is approximate :P] )
Where can I include my design in the next update, so apple could see it and consider posting it?
what is the size?
(is my question even clear? :p)
If you have an app that does very well, Apple will contact you and ask that you prepare special images for the App Store homepage. This blog post lists out the specs as of August 31st, 2009.
It looks like you'll need to prepare two images: a 600x600 title treatment, and a 900x530 layered PSD for the background treatment. (This is the file you see rotating around on the app store background.)
From the post:
Title Treatment
This is a 600 x 600 image of your logo/title. The background should be transparent and it should exclude tag-lines if the text will not be legible at a small scale.
Background Treatment
This is a 900 x 530 layered PSD. What you put in this file is fairly open. Apple states: “The background image, texture, color or gradient should correspond to the application or compliment the title treatment. It may include elements of the application itself, but should not be or include screenshots.”
EDIT:
I did some searching, and found that these dimensions still apply today, and are listed in Apple's Developer Guide. To find this, go into iTunes Connect and click the Download the Developer Guide link at the bottom of the page. You'll find the information on promotional artwork on pages 173 and 174.