Social Media and ROI

Social media seems to be getting a lot of attention lately, and today I came across an article from Social Media Today on the measurement of ROI.
The article is http://www.socialmediatoday.com/SMC/57710
The article mentions how you would actually measure ROI based on various social networks like Linke-In, Twitter and others.

Create Public Accessible Function in JQuery Plug-in

Sometimes you need to access certain functions within a plug-in outside of the plugin. In my example, the JQuery Plug-in creates a list of items, and writes them out as li objects. But if the user selectes some other option in another drop down list, the items stored in the plug-in had to be cleared. [...]