Xml news page?

i need to create a ‘latest news’ page which is updated via xml. I have never used xml, so i really need some help.

I think it should be quite simple, basically the user will add new news items to the xml file, and the flash page will then display the last entry in the main text box. The old entries need to be displayed just by their titles, so when the user selects a title it loads that news entry into the main text box.

Is that possible? If so could the title list display a maximum of 20 titles for example?

Thanks in advance for any help, or any examples