RSS Reader webpart with tab support and asynchronous periodic data refresh using AJAX

I have recently written my first article on Codeproject.

The article describes the development of AJAX enabled webpart on MOSS 2007 SP1.

The cool thing about it is the that it also utilizes the AJAX Control Toolkit including programmatically adding and styling TabContainer and TabPanel controls which can be quite tricky for a beginner. The article can be found here:
http://www.codeproject.com/KB/sharepoint/RssReaderAjax.aspx