For those interested in understanding your own place in blogging history, this site summarizes some of the key points in the relatively short history of web logs.
Blogging 101:
http://www.unc.edu/%7Ezuiker/blogging101/
There are some neat examples of the many varied types of web logs out there, with some beautiful designs. The full article is nice as it does gives a good overview of several of the forms and reasons for blogging. Good resource!