A short while ago i could show you that Dataviz was getting ready to roll out with a premium edition of Documents to Go for the Nokia N900.  they kept their promisses...

there is a trail version of a Documents to Go Viewer preinstalled on the Nokia N900. after that you have to buy it for $9.99 USD!

this was a bit to much for some users, so DataViz decided to promote their Premium Edition (which you have to buy for $29.99 USD after a 30 days trail).

here is the deal: if you buy the Viewer 1.0 you'll get the Premium Version for FREE.

here are the main features of the premium version:

• - Microsoft Word and Excel Editing (including 2007/2010)
• - View, Edit & Create Word 97-2010 files (.doc / .docx)
• - View, Edit & Create Excel 97-2010 files (.xls / .xlsx)
• - Never Lose Original Formatting 
• - Our InTact Technology keeps all of your original formatting safe
• - Multi-level Zoom 
• - Several zoom levels make it easier to view the data you need
• - Live Hyperlink Support
• - Interact with Table of Contents and Web Hyperlinks in your files
• - Password Protection
• - Our support for Password Protected Word & Excel files keeps the files on your N900 secure at all times

here is a video about it shown on a Nokia N900:

source: youtube thanx to palmsolo