Long have the masses - bloggers and non-bloggers alike - decried the Blogger commenting system. No nested replies! Evil Captcha codes! Other stuff!
Well, they won't be saying that about Blog Cabins any longer. They might come up with issues about Disqus to mention, but at least they'll be new.
I think I first saw the Disqus system on a Blogger blog over at Fitz's Nevermind Popular Film. It seemed sharp, glitch-free, combining the best elements of Blogger's and Wordpress' commenting system. So I signed up for an account some months ago. Tossed around the idea of implementing for a while, and finally decided to jump ship to Disqus today. Turns out, the implementation and integration couldn't be easier. It took awhile to import all of the existing comments, but there were nearly 10,000 spanning 4+ years, so that's to be expected. If you're on Blogger and are thinking that Disqus looks pretty cool, I highly recommend making the jump. Perhaps Fitz can offer additional insight, having had it for some time now.
So, to recap: no Captcha, nested threads, a groovy widget that now sits atop the right sidebar, and you can login with any number of profiles that you may have, from Disqus' own to Facebook to Yahoo Blogger to Wordpress (use the Open ID for the latter two and any others that OpenID supports - see the bottom of this page to see a list).
P.S. - I just learned that I can reply to comments directly from my email - meaning, just hit reply and start typing. This is the coolest thing ever - I'll even be able to respond to comments from my p.o.s. mentally-challenged smart phone - sweet!