For whatsoever reason, comment notification hasn't been working for me for some time now. Very rarely do I go to "actually see" my site. I'm happy posting, monitoring via RSS feeds if things are coming out ok (haven't been doing this lately) and responding to comments if and when I receive them via the comment notification mechanism on blogger.
Recently, I observed that my blog has had a few comments up for a few recent posts and I never received any notification for those. Need to check out what has happened. Either that or my email system has been acting up - I know that the spam classification category has been "very severe" of late on my personal email server and there have been a few genuine email rejects by the system.
Anyway, if you haven't heard from me or seen me respond in a timely manner to any of your comments, now you know why - apart from my laziness to type something out ;-)