I recently sent out a question to some 1000 or so tourism academics (professors, lecturers, graduate students, and other researchers) on email discussion lists, asking them "Do You Blog?" The purpose was to see how blogging is used by tourism academics. A summary of my findings can be found here:

http://tourismplace.blogspot.com/2007/05/why-dont-we-blog-university-faculty.html

The major categories or types of blogs that people told me about include:

• Blogging about Tourism
• Blogging for Classes and Students
• Research (and) Blogs
• Personal Travel Blogs
• Podcast Blogs
• Email Lists as Blogs

Click the link above for details. I have been updating these as new blogs are brought to my attention.