This document provides 50 Web 2.0 sites across various categories in 50 minutes. Some of the sites highlighted include Wordle for creating word clouds, TodaysMeet for student comments, SurveyMonkey for online surveys, TubeChop for embedding YouTube clips, GlogsterEdu for creating interactive posters, and Prezi for zooming presentations. Many additional sites are mentioned for blogging, image editing, timeline creation, file conversion, and more.