IBM Connections 4 allows to repost an entry (not all the types of) in a similar way to retweet a tweet on Twitter. Here's one easy way to do it with an asynchronous HTTP (Ajax) request using jQuery.
There is no a link to IBM Connections 4 documentation.
Atom API Request Details
|Content-Type : application/json|
|Status Code: 200 OK|
The id in the json request corresponds to the eventId of the entry that is part of the OpenSocial JSON.
We have tested Repost with events that match the eventType: profiles.status.updated, profiles.wallpost.created
Example using jQuery
Note: console.log can throw errors in IE, they are there for illustrative purposes only and should be changed as required.