The new Nokia Lumia 900 is reportedly selling very well in the US, and currently sits comfortably in the No. 1 spot on Amazon’s “Cell Phones With Service Plans” category.

But Windows Phone 7.5 isn’t getting all the fun, as Nokia has revealed that native Microsoft Office Mobile apps are now available for its Symbian Belle devices.

Wait, Symbian?

Yes, the “burning platform” – as Nokia CEO Stephen Elop so eloquently described – is indeed getting a mobile productivity boost, and the Nokia 603, 700, 701, C6-01, C7, E7, X7, and Oro will all be getting Microsoft Office Mobile suite through an upcoming software update.

The apps will also be preloaded on the PureView 808, but Nokia N8, E6 and 500 users will have to wait indefinitely until further announcement. There is also no word on whether Maemo and MeeGo versions will be launched.

The full suite includes Word Mobile, PowerPoint Mobile, and Excel Mobile, and is completely developed by Microsoft. I realise “developed by Microsoft” means different things to different people (insert BSOD joke here), but I take it to mean they will work exactly as advertised and have excellent format preserving ability.

This should come as good news for business users on Symbian phones, as third-party office apps are generally not as favoured as true-blue Microsoft Office apps. In fact, it’s a key selling point on Windows Phone handsets.

Will this signal a new interest in Symbian? Any Nokia users looking forward to the update? Sound off in the comments!

(via Nokia Conversations)