The beta of Office 13 has just hit the wires and you can sign up for a copy at:
Here are also some promo videos:
Welcome to your modern Office - http://youtu.be/J-3uK2bRNnE
Not only does it mean new versions of old friends like Word and Excel but it also means you can sign up for a beat of Office 365! Here’s a getting started video:
Finally, it also means a new version of SharePoint, which I have downloaded and am playing with as I write this. I’ll have first impressions soon. Stay tuned.