I think I've answered my own question. I was concerned about Raincoaster's comment.
So I went through the terms of service which I clicked through earlier ;)
I found the following statements which covered me as a legal blog:
1. Business: Professionals ranging from realtors to lawyers and stock brokers are using WordPress.com blogs to share their expertise. And companies are discovering the power of blogs to communicate with their customers via company news and announcements, product reviews, user stories, testimonials, etc.
2. How-to, tips and reviews: There are lots of blogs that share tips and reviews about cooking, products, games, music, books, movies, and so on.
Since this is exactly what we intend - we are legal. Hew!