I've had a few people ask, so I wanted to answer the question for everyone: anyone can post comments on my blog. You can use a Google account, as well as a variety of other things, and I've also set it up so you can post without signing in (just select the 'Anonymous' option in the comments' drop down box). In the future I may get tons of spam and this will become problematic, but for now, it's such a new blog, I'm happy to get traffic and to make it easier for people to comment. So please do comment, even if it's just to say hi. I'm happy to know I'm not talking to myself!