Most of it is in the Marketing and PR Subforum: https://bitcointalk.org/index.php?topic=412243.msg4465984#msg4465984 (first post + links)

Swarms: Cryptsy: NiftyNikel - https://nextcoin.org/index.php/topic,2788.0.html, Reddit: Uniqueorn - https://nextcoin.org/index.php/topic,2374.0.html

Blogs, websites:
Chinese:
miramare https://nextcoin.org/index.php/topic,2459.0.html
allwender http://blog.sina.com.cn/nextcoin

Dutch:
Damelon: http://www.nxtcoins.nl/

Russian:
S3MKi http://vk.com/cryptonxt

Swedish:
MAC http://www.nxtcoin-swe.net

Social networks:
Facebook:
apenzl: https://www.facebook.com/nxtmag
QBTC: https://www.facebook.com/thenxtcoin + https://plus.google.com/b/116650043478856930561/116650043478856930561/posts +
Ola: https://www.facebook.com/groups/NxtCurrency/

not sure: https://www.facebook.com/nxt.nextcoin?fref=ts + https://plus.google.com/u/0/103299260549305669411/posts

Polish:
Vilv: https://www.facebook.com/nxtcoinn?ref=hl

Chinese:
allwender: https://www.facebook.com/thenextcoin + http://weibo.com/nxtcoin + http://t.qq.com/Nextcoin

Distributing press release
- leading: NiftyNikel https://nextcoin.org/index.php/topic,2176.msg21679.html#msg21679

- french translations: Ludom + JackCelere: https://nextcoin.org/index.php/topic,2176.msg22513.html#msg22513

- Distribution in the media: salsacz https://nextcoin.org/index.php/topic,2176.msg25891.html#msg25891 + https://nextcoin.org/index.php/topic,2176.msg27107.html#msg27107

- Distribution to the Dutch sites: Damelon: https://nextcoin.org/index.php/topic,2176.msg27536.html#msg27536


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but this isn't all...

please if you know about other sites or social networks, write it to the googledoc:
https://docs.google.com/spreadsheet/ccc?key=0AgAGADgnQcrtdHRrV3V3Z1lzOXVEMWtqdElUaEtqV1E#gid=3