I've recently been using Scoop.it! to bring together stories from around the world about #accessibletourism and #accessibletravel (the hashtags will help to identify the two topics on Twitter). There are some interesting developments taking place right now globally and I hope to help you keep your finger on the pulse.
These are from all continents and many destinations. If you are a student studying accessible tourism then you might find a topic listed that you can delve into in-depth.
If you want to follow these news stories as they break then you can by using this link: http://www.scoop.it/t/accessible-tourism