Each plugin configuration field can define a template tag by which a designer or developer can access its value. If a tag name terminates in a question mark then the system will interpret the tag as a block element. Here are two example configs:

feedburner_id:
    type: text
    label: "Feedburner ID"
    hint: "This is the name of your Feedburner feed."
    tag: 'FeedburnerID'
use_feedburner:
    type: checkbox
    label: "Use Feedburner?"
    tag: 'IfFeedburner?'

And here are corresponding template tags that make use of these configuration options:

<mt:IfFeedburner>
  My feedburner id is <mt:FeedburnerID>.
<mt:Else>
  Feedburner is disabled!
</mt:IfFeedburner>