We have a news source. It's called the Blockland Forums. A blog about what you're doing wouldn't be bad, but we don't need a website which tells us what is going on when we have one right here. If you want to interview people just make a topic on it. I basically just see it turning into an advertisement for whatever you think should be advertised. That's why a blog for just your blockland activities would be better.
I think it's more of a you want it to say you made it, not that you want it because it would be useful. I honestly don't see it being useful unless it's made for a specific user. A "What Icygamma is doing", focusing on mainly you would be better than "What Icygamma and the occasional "lucky guest" are doing".
If there was going to be any blockland blog, I would want it from Ephi or Badspot. I wouldn't want a blog about recent blockland "drama", or how "kalphiter is flaming servers", or "Best add-on this week". I can already find all that out on the forums. The only blog I would be interested in reading would be one by the developers and their opinions on things.