wordpress RSS feed data display in widget

I'd like to develop a new widget similar like we did it with the XML News. Maybe we can use the same business logic. Idea is to show the define an RSS feed per tab where we show the news provided by the tabs. First two tabs would be this one [login to view URL] <iframe src="[login to view URL]" width="280" height="300" frameborder="0"></iframe> or if better usable this one [login to view URL] This is how it looks like today (on Homepage) [login to view URL] [login to view URL]