talk on blogs

Okay, so I've got the main outline for my talk on blogs at the Department of European Ethnology in a few weeks. It'll be very simple, 'cause I expect that people have never heard of blogs. Here we go:

• What are blogs?

(including definition, who writes why blogs...)

• How does one starte one?
  

(don't know yet how many providers I should introduce, also I want to include a short how-to)

• Why should I as scientist do that?

(advantages & disadvantages - yet to find out...)