Thanks for the info on RepliGo - I just did the free trial and it's MUCH better than the 'native' Attachment Viewer with BlackBerry Web Client. If you work with attachments a great deal - it seems like a good solution. (but will cost you a subscription fee)
I also figured out how to view pages 2 and beyond with my eFax service (at no additional cost) - change the format from TIF to PDF in the eFax sending options.