Quoted: BackType gives your comments a home where they can be discovered, followed and shared. Comments from blogs, social news sites and more on BackType

Quoted: The idea of "sticky notes" on Web pages was supposed to be about free speech. But Web hosts didn't like what they were hearing, and campaigned for Third Voice's demise. Their wish came true. By Aparna Kumar.

Quoted: Fast, powerful and incredibly simple, JS-Kit's services let web publishers build dynamic, compelling online experiences in just minutes.

Similar to Go2.me, reframeit frames any web page to allow commenting. I've not tried it yet - but this looks like an enterprise version of what Go2.me offers.

I found them on AngelSoft - they've actually raised nearly $1M to develop and sell this product.

Quoted: Disqus is a global comment system that improves discussion on websites and connects conversations across the web.

Similar to Go2.me, this video commenting service overlays any web page with user comments. But this one captures webcam videos and plays them on a "bubble" (circle) overlaid on the page.

Quoted: Bubble Comment is a great way to add a quick and personal video comment to virtually any web page that you can send to others.

I was surprised to see Seth Godin dissing his users by not supporting commenting on his Blog (is it really a "blog" w/o user comments??).

But he does support TrackBacks. So, if you have your own blog, you can "comment" on his post.

Quoted: Seth Godin's riffs on marketing, respect, and the ways ideas spread.

Custom modules should use Doxygen comment standards if you ever what to submit a module to drupal.org. API docs can be automatically generated.

Quoted: Source code documentation and analysis tool

Pretty cool concept of a federated comment-and-user rating system. Integrated with some blogging platforms now. Would be a cool add-in to Faves.com, too, I think.