http://www.outsourcing-center.com/

This link has an abundance of information related to outsourcing. There are current articles, and whitepapers on the topic. In addition. there are forums by industry. For example under accounting, two articles that caught my interest were about a real estate company that had advantages from outsourcing accounting, and a white paper about transition issues in year 1 of outsourcing. However, you have to provide extra information to get the free copy of the white paper. Still this source may be of interest to you.