LineBuzz, in-line comments tool for bloggers

LineBuzz is an in-line comments tool for bloggers. They just launched in beta today.
With LineBuzz, you can offer a way for readers to view comments on particular pieces of text within your blog entry. As a reader, you can highlight the text you’d like to comment on, and click “Comment inline” which is installed on the blogger’s sidebar. All inline comments are shown in this sidebar as well. Mousing over the commented text will indicate how many comments have been left regarding this text, and you can click this to have a window pop up that shows the comments. Readers can reply directly to comments from this window as well. Mashable has more on this ...
[Via Mashable.com]
Also read Darren's post on Problogger: LineBuzz - Inline Comments