The Beta Bloglines is different from the original in that you now have:
* three different reading views (quick view, full view, three-pane view); and,
* drag-and-drop feed management.
Enhancements to be added to Beta Bloglines:
* Mobile Bloglines,
* Save, send and share a post,
* Edit feeds and settings,
* Use of disposable Email addresses,
* Upgraded developer APIs, and
* Ability to create a Link-Blog.
For more information, please see this post from Andy Beard: Bloglines - Why You Should Test Out The New Beta.