[Zope] some advice for a news site

We have a project of a Web-zine that has to run on a Linux box. I heard about Zope and I'm impressed so far. The site will have functionality like "related news" and "send this to a friend". We also need to be able to categorize the content/news and search with keywords. There will be "subscribers" that will receive daily tips with links to the news on the Web site. Those will be stored in a RDBMS. We took a look at PHP3 and MySQL as an interesting choice, but after reading about Zope we would like to take the better alternative. Is it possible to use the Z ODB to store the news instead of a RDBMS, without loosing the functionality we need?... Maybe a combination of Zope and MySQL?. Any advice would be appreciated. Luis Bordas