Advice on joomla custom content compatibility with Easysocial

Hi,
Hope i'm in right place to ask some advice.
I'm working on a joomla collaborative platform with easy social.
Our goal is to let our registered users to publish custom content like classified ads.
We want to use easysocial to animate the community around that content.
For exemple, the custom content could be a classified ads for car-pooling, and we wish to use easysocial to let the community exchange with the user, rate him etc.
One plus will be to import automatically this type of content in Easysocial Events.

So at this point of the conception, we are sure we want to use easysocial, but a huge part of the business process of our collaborative platform, it's the custom content post by the registered users.

There is two way, i guess, to do it:

• use a CCK to build new custom content for joomla, but it need to be compatible with Easysocial.
  
in this case witch one do you think will be the most suitable for our need.

• Or maybe build in the functionality in a Easysocial application ?
  

I'm aware that my description is a little foggy, but i can't actually explain exactly the concept of our platform.


Anyway thanks in advance for your help.