Unfortunately, I don’t have any code to share…
I do use the “WordPress Integration” option to create a new WP user with a default role of “subscriber”, but I’d like to have each product be allowed to be assigned a different role (product A is “subscriber”, and product B is “contributor” – or something like that).
Simple Press Forum already understands (and in fact expects) WP roles to be used, which makes integration on that end a breeze….
I think it’s just a matter of allowing each product to specify which role to use when it creates the WP user….
or I could be wrong 
I think that others would benefit from this (again, I could be wrong), so I was envisioning a drop down in the product creation that would search the current roles in place (so that Role Manager plugin could be used), and allow the new users to be assigned that role when created….
I don’t know if this is a eStore or eMember modification though…
If you don’t have time to look into this, a few hints on where to look would be helpful as well.
Thanks
Matt