• Create / edit / share -- it's social
• Word processing, spread sheets, presentations
• Blogging and Web Design
  
• Audio, video, images
• Perpetual beta (so get used to it)
  
• Gets better and better as time goes on and more people use it
• Applications are constantly updated -- no downloads or updates to run
• It's not proprietary (like Microsoft), so views perfect on every platform (Mac, PC, Linux)
• Industry standard Backbone (for programmers): xHTML, CSS, W3C, XML, flash, AJAX

Web2.0 Categories

Web2.0 applications can be broken into a variety of categories.  Some examples are:

Blog Blogger (Google) Wordpress Web-Page Google Sites Google Docs Docs, Sheets, Presentation Share (co-edit, view) Folders. Upload MS files Publish Revision and Tracking Social Bookmarking Delicious tagging RSS (Reader) Reader (Google), Bloglines Survey/Assessment Doodle, SurveyMonkey Google Forms

Photos/Images Picasa (Google), Flickr Scribblar, Skrbl (whiteboard) Video Tokbox, Yodio YouTube, Google Video Ustream, VoiceThread Audio Skype, Tokbox, Yodio Tech Support & Tools CatchVideo TeamViewer DropBox (my favorite) Wiki - WikiSpaces; CMS Social Networking FaceBook, Twitter