Here a roundup of Windows Phone 8.1 articles:
Our top five features of Windows Phone 8.1Windows Phone 8.1 Reviews and Tips
Windows Phone 8.1 Review
Windows Phone 8.1 Review - Cortana has arrived
Windows Phone 8.1 Tip: Show More Tiles
Windows Phone 8.1 Tip: Take a Screenshot
Windows Phone 8.1 Tip: Use a Start Background
Windows Phone 8.1 Tip: Use Reading View in IE 11