I love the web 2.0 interface and my only complaint was that it was not JomSocial compatible... until I just noticed it was updated yesterday. I'm downloading the latest version! w00t!
Big fan of 1.8 and very much looking forward to their native 1.5.x/1.6(?) version.
I had tried Agora once I found out about the Fireboard project falling to pieces and am so glad to be coming back to this much cleaner forum system.
I have to agree wholeheartedly with cowboysdude's review, especially about the use of Kunena with CB 1.2 and uddeIM being the perfect combination and it certainly has become the de facto Joomla standard.