Web 2.0 in a classroom of Diverse Learners in COLLEGE

Hello to all ... I'm giving a presentation to instructors at a local community college on Diverse Learners. This is in the realm of differentiated instructions. Any thoughts on what to concentrate on? It's a short (40-minute) preso and I wanted to go to the direction of using Web 2.0 tools in a college classroom of diverse learners. Suggestions? :-)