[wp-hackers] Custom list of posts per user

[Kevin Newman]

  Hi there,

I'm trying to create a plugin that will allow users to add any kind of 
post into a list that is associated with that user's account. I'd like 
to do this without relying on the addition of a table into MySQL (though 
that would probably be the easiest way to go).

Anyone know if that's been done before?

This kind of functionality would be useful for something like adding a 
product post-type to a cart (a list stored with the user) for example.

I had thought of using a hidden custom taxonomy, and filtering on that 
using either a hierarchical structure or associated data (doesn't seem 
possible). For hierarchical structure the idea is to add a top level 
term (or tag) for each user (based on their user id), then add any lists 
they create as children of that term - thereby limitting that term list 
to that user (and allowing for the admin to monitor and edit these 
lists). I haven't been able to find the necessary actions or filters to 
make that happen (I'd need something like an action for 'add_term' I'd 
guess).

Any help is appreciated!

Thanks,

Kevin N