I like all the services using LinkedIn as their platform for social networking. The local implications haven’t really come into focus yet, but the latest publisher to put something out is Business Week, with its Business Exchange.

Developed by former PowerOneMedia tech guy Issac Sacolick, Business Exchange uses LinkedIn profile information as a base, crawls the Web and leverages Business Week’s audience to create, track and contribute topics and posts on any given subject – such as “Newspapers,” which is actually a pretty big subject.

Sacolick says that people are always thinking they already organize their info with RSS. But the reality of RSS is that it is very ad hoc. “BX is organized by topics, already aggregates the top news and blog sources, and leverages the wisdom of the crowd to prioritize the most important topic,” he says. “It’s a simple way for business professionals to build up their online persona and should be really useful for business professionals, small business owners, managers, MBA students, and contractors who want to establish or promote their expertise.”