We're back... but comments have changed.

The good news: the blogs are back online, and speeds are back to normal. Thanks for your patience. The bad news: the comment system has now changed so that you can only comment after you have created an account and signed in. This overwrites my old comment policy of being able to comment freely once your first comment is approved. For the record, I found out about this change on Monday and I'm not happy about it. If you feel the same, just bear with me - I'll have an update in a week or so. Or feel free to voice your views by... erm... registering and leaving a comment, or sending me an email. In the meantime, plenty of cool science coming up...