What I'm trying to do is to create a "Simple News" version of Simple Blog with different HTML/CSS for the posts (news items). So far I've edited all of the source files to change "blog" to "news" everywhere so that it can co-exist with Simple Blog. Then I started to go through changing the code that produces HTML/CSS, but thought that I might as well try to remove all the functions relating to commenting - and that's when I noticed the twitter stuff.
There's probably nothing that I need at the moment for my news version, but I may come back later about the twitter linkage.
Thanks.