Just a little update here...
I'm in the process of adding Trackback to the plugin. It took a bit of studying Movable Type's standalone program before it made any sense what was going on.
The Bookmarklet idea is nice. What I'm planning on doing is adding auto-discovery for the trackback url. basicly, the bookmarklet will first scan the page for embedded RSS data, and present that to you. You can then select the post from the list, and fill in the appropriate pinging fields for when you submit your post entry for adding to your blog. If no RSS data is found, you'll just go strait to the form where you'll have to enter that info on your own (usually listed on the "trackback" popup window on most blogs).
I'm hoping I can have a demo you can play with with trackback enabled on it sometime this week. In the meantime, however, you can try it with only weblogs.com.
http://www.perlmad.net/...ser&user=perlkid The link above is for my test blog, but feel free to create your own account to play around with (since you can't add/edit/delete my posts). When you make posts, weblogs.com will be pinged, so look for "Username's Blog" (ie, "perlkid's Blog") in their listings after making a post. (note that they only allow one ping per half-hour)
Philip
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Limecat is not pleased.