Anyone who has seen me tikki touring around the world with my Tablet PC in tow will know that I'm a HUG fan of Outlook Web Access... outside of the firewall here @ Kognition it's all I use (save for my Smartphone checking mail during the day).

The Exchange team @ MS are offering a free trial of OWA here... it lasts for 30 days which should give you a good idea of what it is like.