I want a user to be able to log into my site. Then select items from a larger list and create a sub list. the user should be able to create a number of sub lists all containing different elements from the larger list. The user should then be able to 1) send a sub list to his/her contacts via email or 2) send a sub list to his / her friends on facebook.
Ideally the website will run as a standalone app and also be available as a facebook app.
The list, sublists, creators and list of contacts should all be stored in sql or mysql database (or equivalent)
Is this possible in wordpress? Can anyone give me any pointers / suggestions to get started?