General Features

option to select the screen to show after adding a product
specify a percentage size for thumbnails
size the preview window on images in admin based on the image size
have an "Are you Sure" message on empty basket feature
ability to turn off store features on a subsystem basis
have an offline mode that displays a nice message that the site is unavailable
split up the general settings screen
handling of multiple host names for a system for cookies etc...
add ALT text to all images in the store
option to have sort order on specials and new pages
make the admin screens multi user accessible with different options for each
phone number validation needs to work for International users
allow logout from the store (ie: kill the customer cookie on the browser)
add a separate email address for error messages
images in the admin should be sorted alphabetically
have default colour settings for each template

Products

change the style editing and entry system completely for faster data entry
have a featured product option
allow adding a thumbnail image instead of a resize of the main image
allow faster product entry the same way categories work
price change utility
allow a Free product type instead of 0 price
allow store owner to determine action on out of stock item
allow setting of a maximum order for a single product item
have minimum order quantities for a product

Taxes

show the tax percentage on the invoice and basket

Content Management

option to send order details with the thank you message
ensure all messages have pages to edit their content
be able to edit the subject of all emails sent out
complete ability to add additional pages to the system
content editing should allow addition of graphics and their placement
allow pointing of whatsnew, aboutus etc... pages to a specified URL

Discounts and Promotion

ability to enter a quantity discount table with percentage
discount percentage on a per customer basis
have range of order total and apply a flat or percentage discount
allow setting a product as non-discountable
products only available to members
presetup members who can login and get their cookie
have featured products on the home page of the store