I found this trackback tool. Handy if you want to send a trackback to another site if your blog doesn’t do it automatically. Unfortunately, can also be used in spam trackbacks… But then, this is why you (the general sweeping you) should always check not just comments but also trackbacks and pingbacks for spam. I’ve had a few trackbacks come through recently that were legitimate – they actually did point to a blog that did reference my post. Unfortunately, they were splogs (spam blogs), so I still count it as spam and deleted them.