Would also check out postatic.com - there are quite a few startup-related communities on it already

http://news.fwdkc.co

http://buildupnews.postatic.com

http://southstart.postatic.com

http://thenordicnews.postatic.com

http://kwstartups.postatic.com

http://lawhackers.postatic.com

http://newsfintech.postatic.com