I haven’t had a huge amount of comment or track-back spam but have decided to enable the new “Hold for approval” feature TypePad have provided. It’s a chore deleting these things and one I can avoid. Everything other than blatant spam or offensive material will be approved.
I have also enabled optional TypeKey identification if you wish to use that. TypeKey is a free, open system providing you a central identity for posting comments on weblogs and logging into other websites.