Since the beginning of June I have noticed a lot of Pingback/Trackbacks have appeared in the Feedback area of my blog. My understanding is that these are simply links on another web page to one of my blog web pages. I have always had the odd one or two but suddenly I was getting 20 or 30 a day and all from on-line betting web sites. I have no idea why they are appearing or what purpose they serve. See las vegas slot machine for an example of one such link. Needless to say there is no link to my blog on the web page in question. If anyone has any ideas why they appear let me know! They are a nuisance because they clog up the feedback section of my blog where I can view the latest comments and ping/track backs to see who is linking to my blog.