The height of the gravatars means that these boxes are pretty tall, which makes it less obvious at a glance that there's hidden content. I wonder if we can use that extra vertical space and give the bottom a jagged edge (excuse my crummy ascii art):
----------------------------------
| + Christian Hammond |
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
This way it would be more immediately obvious that something was hidden.
david:
Can we use the same + and - icons as in the review boxes?