If you read the blog rules you will see that I ask people not to post links in their comments. Despite this people continue to do so all the time. Up to now, I have edited these out, except on very rare occasions when I have let them slide because they are of interest and not designed to advertise other websites/blogs etc.
However, the systems I use have recently changed (against my will) and I am no longer able to edit comments and take out links, so any comments that have links in them are now being deleted completely.
So, try to avoid putting links into your comments, as the comments will not appear if you do.