I have a similar problem and I'm pretty sure it's not Technorati.
As you can see here, when I post new entries, they are showing up with the title and permalink of one post and the content of a different post.
I have had all kinds of trouble using technorati tags (with Bunny's Tags plugin) because the same thing would happen: the title and tags woudl show up with the wrong title and link! The weird thing is it worked for a while until I turned on "Attempt to notify any Weblogs linked to from the article." Now I have tried it with tha on and off and it doesn't seem ot work either way.
I thought it was technorati at first, until my blog sent a trackback to itself and did the same thing. See this example: http://lotusmedia.org/live-from-minneapolis#comment-2111
Anyone have suggestions about what could be causing this? I'm running WP 18.104.22.168.