Went with Nobu to see Nob Seki of Six Apart speak about blogs. Six Apart is probably best known for their tool Movable Type, and their recent purchase of the popular LiveJournal service.
It was an interesting talk. Seki presented statistics from several studies regarding the current status of the blogging industry and the anticipated market. I found the data gathering methods pretty interesting. In one study, they surveyed a sample size and extrapolated the results to the entire population. Another study looked at ping counts from existing blogs and used that to estimate the total number of blogs in Japan.
I think the current popularity of blogs is a reminder that good tools are always going to be useful, and they may drive interesting innovations in unexpected areas. Essentially web presence is really cheap and there are a lot of opportunities to use that.