I'm behind the curve, it seems, but in trying to add some permalinks that can search aggregators to my template, I have discovered Technorati tags. I will be checking this out....
I am also interested in linking from each individual post to the aggregators that discuss it:
In the meantime, in a big new addition to freshblog that lets me do more with interactivity and inbound linking, I have added Haloscan trackback. I kept the blogger comments because the last time I messed with the comment HTML I screwed up the whole template, but I did manage to make the trackback link look the same. Excellent. I doubt anyone will trackback my posts, but I will be able to leave my mark elsewhere & bring some more readers.