Activity Streams for Social Media

Today most of the social media data is stored in No SQL databases as Activity Streams. Below given is some of useful activity streams I found over the internet

Discussion
{
"_id" : "4d19fb9ddhd4000005",
"_t" : "Discussion",
"created" : "Tue, 28 Dec 2010 07:00:35 GMT",
"GroupID" : 129242,
"eIndividualID" : "22872F9",
"firstName" : "Danial",
"lastName" : "Micheal",
"discussionStart" : "How is the meeting.",
"comments": [
{
"_id" : "4d19fe329aceye400000a",
"eIndividualID" : "FFE4251",
"created" : "2010-12-28T15:11:46.6760000Z",
"firstName" : "Robin",
"lastName" : "Tally",
"commentText" : "Went alright. Thank you"
},
{
"_id" : "4d19feyey027400000a",
"eIndividualID" : "FFE441",
"created" : "2010-12-28T15:11:46.6760000Z",
"firstName" : "Robin",
"lastName" : "Tally",
"commentText" : "That is good"
},
{
"_id" : "4d1deheh000003",
... } ]
}

Live Chat 
{
"_id": "4cd261dsdfshsd000006",
"senderEIndividualID": "1B0D6E8",
"senderFirstName": "Danial",
"senderLastName": "Tally",
"sendDate": "Thu, 04 Nov 2010 00:31:32 GMT",
"groupID": 119420,
"message": "way faster then "
}
{
"_id": "4cd261a69ac0900c2400000a",
"senderEIndividualID": "B656641",
"senderFirstName": "Steve",
"senderLastName": "Chen",
"sendDate": "Thu, 04 Nov 2010 00:32:54 GMT",
"groupID": 119420,
"message": "ohhhhh"
} 
{
"_id": "4cd2621b9ac0900c2400001f",
"senderEIndividualID": "1B0D6E8",
"senderFirstName": "Danial",
"senderLastName": "Tally",
"sendDate": "Thu, 04 Nov 2010 00:34:51 GMT",
"groupID": 119420,
"message": "I think it made"
}


User Data 
{ "_id": 4252992,
 "events" : {
 "all_ids": [ 116706, 179487, 16389, 827496 ],
 "curr_ids": [ 827496 ],
 },
 "nns" : [
 [ 2816442, 0.2 ],
 [ 1615962, 0.047619047619047616 ],
 ],
 "facebook" : {
 "_id" : 4808871, 
 "name" : "Danial Tally",
 "location" : "Melbourne, Victoria",
 "mutualfriends" : [ 56341525, 262659792 ],
 "allfriends" : [ 56341525, 562526567, 262659792 ],
 },
}