A new Share/Bookmark link at the bottom of each post allows you to share it on over 100 sites. Mouse over it and the pop-up box will list a few sites it thinks you use. Type a name in the search box to find others.
The single post page now has an unobtrusive Google vertical text ad at the top rather than a big honking ad which could get confused with the content of the post. The big honking ad has been moved to the bottom of the post, where it looks better and where Google says it can actually be more effective. All ads can be text / image / or video which adds a little variety.
I’m thinking of using Disqus for the comments. Are any of you using it?