While liveblogging the IHMC 2012 scientific conference on Google+, Thomas Sharpton and I quickly discovered that comments on a post do not update in realtime there like they do on FriendFeed. Kudos to the FriendFeed engineering team for the solid and groundbreaking innovations they made!
This particular feature is useful during collaborative liveblogging so we can see each other's comments and reduce redundancy while composing our own. - Ruchira S. Datta
On the plus side for Google+, conference liveblogging bangs on the commenting system really hard, and I've seen nary a glitch so far. - Ruchira S. Datta