While a mash-up feed for user created content and activity is not present in the current release this has been raised as a possible improvement (JIVE-60273). If you would like to track the status of this improvement I would encourage you to open a case in your Jive Community secret group where the next available support engineer can link the case to the previously mentioned improvement. In the meantime, you can pull this type of information through RSS feeds, however it would require 2 feeds (using the Jive Community as an example).
One for participated content -
One for user created content -
Hi Jesse, thanks for answering this but i have one follow up question. For the second feed example you posted, where would i put the person's user ID in that URL?