I have just been reading about Tags and Bookmarking using the site Del.icio.us. Tags are a way to organise your work or blogs in a free-form method of catagorising. Other users can add their comments and links to this. It is helpful when you run multiple blogs or different sorts of blogs/podcasts such as a video blog (vblog), written blog or audio blog.

With regard to using bookmarking as research assistance, I think it would need to be less free-form or more controlled so that people do not create unsuitable catagorises. Bookmarking is better suited to be used as a tool to let you access blogs anywere.