Hmm. I'm not sure why I shouldn't be up in the list there. I think each blog owner can set how often their list refreshes, so that may be the issue. It's also possible that I have a little bug in there that hasn't been caught since my blog was one of the ones that script was tested on. I do get traffic back from it, so I know it works somehow.
Granted, it's not a huge amount and all like you'd get from a script that skims a TGP, but it helps, and that leads me to your next question.
I'm no SEO guru, but I think that the SE's do index it all right. I think they ignore the query string, but everything up to it gets indexed. A ton of my posts are indexed on google, and after I started the blog it went from PR0 to PR3, and I didn't really seek out link trades aside from that script, except for a couple.
I'd link you to google to show all the post that are indexed, but it seems that this morning some of my sites dropped off and are now PR0. Hopefully it's just one of those temporary google things
If you have any specific questions that would probably be answered better by the guy wrote the plugin, let me know and I'll PM you with how to get in touch with him.