Shanghai Tour – managed by the Shanghai Municipal Tourism Administrative Commission

http://lyw.sh.gov.cn/en/

Shanghai tourist and information centers, their addresses and phone numbers:

http://lyw.sh.gov.cn/en/info/list.aspx 

For every fresh news, ShanghaiDaily is your best choice:

http://www.shanghaidaily.com/

For expat talking about Shanghai--Living and woring in Shanghai:

http://shanghaiexpat.com

City Weekend is a great free magazine about events and attractions in the city that can be picked up in bars and cafes around the city.  Their information is also available online: City Weekend

That's Shanghai is a free monthly magazine also found around the city in similar places as City Weekend.  A database of their information has been pooled with Asiaexpat's resources: http://shanghai.asiaxpat.com/