Unlike Outlook 2007, Entourage 2008 does not aggregate RSS feeds. Never-the-less there are many other RSS readers available for Mac OS X. If you use Apple's Mail program to read your Exchange Mail via IMAP, then you can subscribe to RSS feeds directly in that client.

Here are three basic options for subscribing to RSS feeds, though you can google up many more.

Outlook 2007 allows you to add RSS feeds and view them right in the Outlook client.

In short, to add an RSS feed to Outlook 2007:

1) Locate the link to the RSS feed, shown here in Internet Explorer
2) Right-click on the RSS icon, and copy the link.