Design a family of SnapShot icons

NSN Solutions, Inc.

We developed "SnapShot Postcard" and related apps that allow users to send custom printed and mailed postcards from their iPhone/iPad/iPod.

We are looking to revamp the SnapShot Postcard icon into a family of icons for our growing portfolio of apps. When we initially designed the SnapShot icon we did not anticipate we would be developing related apps.

We want a clean, iconic family of icons that messages our service of mailing real, physical, printed and mailed postcards and greeting cards. Prefer no text on the icons. We are open to any color scheme, but tend to like bright colors that stand out on the iPhone next to other apps.

I'm imagining each icon to be very similar, perhaps the same background but with a different image (e.g. events vs. holidays) We are looking for a total of 5 icons (the last two are for future products):

SnapShot Postcard - our flagship product, popular with the traveler sending pictures back from their trip.
SnapShot Holiday - for sending holiday postcards from Christmas to Father's day and everywhere in between
Snapshot Event - for sending postcards to celebrate events such as birthdays, new babies, graduation, just moved
SnapShot Greeting Card - instead of a postcard this is a greeting or note card that is folded in half and mailed in an envelope
Snapshot Realtor Postcard - postcard a Realtor will use to market to prospective home buyers

I need an application file (e.g. PSD) so I can scale it to various sizes. The icon needs to look great at 57x57 up to 512x512 pixels.

We do require that NSN Solutions owns the copyright on all of our graphic assets. As such, NSN Solutions shall be the copyright owner of the "works for hire" produced as the final winning design in this contest by the winning designer.

By participating as a Designer in this contest you agree this and the previous paragraphs constitute a separate agreement in writing between the Customer (NSN Solutions) and you, the Designer.