Yafi, short for Yahoo! Finance, is based on Yahoo! Finance RSS feeds.
You can subscribe topics of choice, and each topic is displayed
in a single tabview. You may select and add more than one tabs (topics).

For more information on Yahoo! Finance, see:
http://developer.yahoo.com/everything.html
http://finance.yahoo.com/rssindex
http://developer.yahoo.com/finance/industry.html

Database schema
 title : string
 url : string
 time : int
 topicId : int
 status : int