content profile 6.x prototype

I'm creating a new thread for continuing the discussion of http://groups.drupal.org/node/8261.

I've just done some work and implemented a first prototype of the possible base module (variant 2) --> http://drupal.org/project/content_profile -> Test it!

This prototype allows to mark multiple content types as content profile, but tries to keep the code clean and simple. As nodeprofile had already the multiple content type stuff, I found it easier to start with it, and so I took the ongoing nodeprofile 6.x port, scraped features out of it, simplified the code and made it more extensible.

To make using the module the first time easier, the module comes with a default content type named "profile". It provides some settings per content type, which can be edited in a separate tab that appears when one edits a content type (like the CCK tabs) and supports displaying the content profile on the user page with different display styles.
The module comes with a set of useful functions, which should be useful for possible extension modules. Furthermore the settings system of the base module is extensible, so other modules can use it too.

It's a prototype, so don't expect it to be ready. (Although most things seems to already work.)

What needs work:
* Validation for only one profile node for site admins is missing
* This validation should work with translated nodes, this is also TODO.
* integrate missing features from bio module, e.g. link from the node to the user page
* and probably the themed output of the module on the user page.

I'm not good in theming, so the display stuff is basically the stuff from nodeprofile ported to 6.x, which I don't really like myself. So someone with more theming skills could be very helpful here.

So what do you think about? Should we build the base module out of this?
Should we go with the name "content profile"?