It seems to me that there needs to be more social-oriented blocks for Concrete. I found this (see link) tutorial on how to create a wall post and comments system (it's identical to Facebook's wall system.

http://www.99points.info/2010/07/facebook-style-wallpost-and-commen...

Here is what I would like the block to do:
- It could be enabled (from the Dashboard) to show the block on personal profiles.
- Can be placed as a regular block anywhere
- Option to require solving of a CAPTCHA
- Option to be visible only to registered users

Anyone interested in building this?