Made some changes to the commenting: I decided to use the built-in commenting feature instead of the haloscan.com one.
Pros: Fewer passwords to remember and fewer sites to log into to do administrivia; also you can specify an email address to have comments sent to when someone comments on your blog so's you don't have to check it all the time.
Cons: You can't (as far as I can tell) delete individual comments (e.g. in the case when someone you don't know makes a stupid comment or whatever), you can only hide
all comments for a particular post.
I emailed the people at blogger.com about this. Perhaps something will come of it.