I found an interesting DOM script that looks for a specific class and places a link inside that class that lets you print just that div. I think it would work great on the CommentBody div (so you could just print a specific comment), but I don't think I'd be able to turn it into an extension without modifying the theme by hand.

Anyone think they could take this script and make an extension out of it that works with all themes?

http://lloydi.com/blog/2006/03/21/how-to-print-selective-sections-of-a-web-page-using-css-and-dom-scripting-2/

I'm sure there's probably an elegant PHP solution, but I wouldn't know where to begin. I thinking that it would look something like this:

I totally have a use for it. My coworker is constantly printing from the PM install of mine. I was just having her use Grab (OSX) and only selecting the comment(s) she wanted. This would be totally cool. I'd like to see this happen.

The wordpress plugin is really a print-to-preview. Personally, I think it's a bit jarring.

I think the DOM script is preferable. It's cleaner because it keeps the user on the page and the view doesn't change. It just prints.

I started playing with this over the weekend and do have it working but with one major display problem. It was really easy to implement into an extension by just including the js and style. But I had to change the js to work with the Vanilla comments. So, I got it to work but with this display problem. If anyone knows js well and can help me, I would appreciate. We can take the discussion offline, unless you think a description of the problem would be of interest to everybody.