XKCD Bookmarklet that on click 1) takes you to xkcd.com then click 2) inserts the image title under comic, scrolling into view if needed, and click 3) takes you to explainxkcd.com.

xkcd-show-image-title-bookmarklet.js

javascript:
cd=document.getElementById('comic');
if(cd) {
  if(cd.childElementCount==2) {
    window.location='http://explainxkcd.com';
  } else {
    p=document.createElement('p');
    i=cd.children[0];
    if(i.tagName=='A') {
      i=i.children[0];
    }
    p.innerText='Title: '+i.title;
    cd.insertBefore(p, null);
    p.scrollIntoView(false);
  }
} else {
  window.location='http://xkcd.com';
}

xkcd-show-image-title-bookmarklet.txt

To use, copy and paste into an existing bookmark's URL.

Bugs:
For chrome users this (and any other bookmarklet) won't work on the New Tab Page.
http://code.google.com/p/chromium/issues/detail?id=98871

Work-around:
1. Only use the bookmarklet on open pages. Use apple+click to open in a new tab.
2. Replace New Tab with about:blank
https://chrome.google.com/webstore/detail/pfdloiaebhgmjpaclbbodcmlmppkakjh