Yes we will work on this after launch. The focus was physical goods because thats where our own expertise lays.
We will add digital goods to shopify while working together with our userbase to make sure we get this feature nailed as elegantly as physical things.
We are also interested in using Shopify as a vendor to sell a service (or intangible product) rather then an actual tangible good.
Our business provides professional digital photo manipulation and restoration. Therefore we are looking for a web-based solution where the user can select a service (which Shopify does very well), upload their image (via a custom form?) and pay via credit card or paypal.
I have loved everything I have seen from Shopify, but does this sound like too custom of a business model to be able to use your service?