You can turn on tweets translation, allow Disqus comments and… write posts with source code highlighting!
To use source code highlighting it is required to make first line in your code blocks to be something like
#!xml, so I recommend to write them using
Markdown-edtior (it can be selected in your profile preferences). SHJS (copied to
static.tumblr) is used to make it work. You also must specify programming languages used in blog manually (not just by checking “Highlight code” checkbox) in the sort of:
sh (Unix Shell),
To translate tweets, set your “Twitter username” at theme customization.