Let me expand on this as someone who has used an N95 and an E71 to support my corporate Exchange account. There is a huge difference in messaging approaches between the N-series device and the E-series device. What christexaport says is somewhat true that the E-series tend to have better build quality while the N-series will have more of a multimedia focus with better camera. However the home screen setup is so much better with E-series, showing quick snapshots of email accounts, calendar and notes. This provides a quick, easy way to get to email inboxes or preview what message has come in by highlighting the box. They typically have dedicated keys to get to contacts, calendar and your email. E-series is designed to be a messaging device first and this difference is so frustrating when going back to the N95 and I feel my productivity take a hit. You can install Mail for Exchange on the N95 but the implementation is not even close to what it is on an E-series device.

E-series will come with a full version of Quickoffice to allow you to edit documents where N-series comes with a read only version.

Now, the N900 isn't Symbian so it's not coming with Quickoffice but I thought I saw it came with a Docs to Go install? Also, hopefully you can add an email widget to your screen to enable you to see what's hit your inbox. How will they do subfolders? If they do subfolders... Don't believe everyone when they say Mail for Exchange is "awesome", it's not but it gets the job done. I have high hopes for the implementation in Maemo but I will reserve judgment for when the device starts shipping and I see reviews.

The problem with waiting for reviews is that few people actually use these devices in a corporate environment so you will hardly ever see a review based on that. I searched forever to find a review of the new messaging on the E75 and it came down to me actually requesting a trial device from WOM World so that I could actually see it for myself. So I wrote my own review. Maybe I'll be able to get my hands on a trial N900 as well but we'll see. Wait and see and ask questions when the device starts dropping.