The N800 lacks a certain level of polish compared to WinMo. The MS platform delivers good business connectivity for word, excel and outlook email. The negatives are the stability issues that another user talked about and the browser options are terrible.
For using word docs on N800 try this workaround , Gnumeric is good for spreadsheets.
For email use I tried using Claws Mail for a while which is a great IMAP client but I found that using Exchange Web Access was a lot better and the screen fits excellently on the 800 pixel wide screen.
Basically if you want to use web based tools for connectivity the N800 is great if you want to sync for offline use then the Windows Mobile unit is probably a better bet.