A smarter bookmarklet for Pinboard.in; wraps selected text in <blockquote> tags, keeps variables out of the global scope, supports filling tags from rel="tag" markup in the page, and titles from hAtom entry titles. (brysmi) I've added meta "description"

pinboard-full.js

javascript: (function() {
  // Change `silent` to true to invoke the promptless, self-closing 
  // version of the bookmarklet.
  var silent = false;
  
  var url = location.href;
  var title = document.title;

    // uncommment to open your pinboard page in chrome
//    var re = new RegExp("^chrome://(.*)");
//    if (re.test(url)) {
//        window.location = "http://pinboard.in/u:username";
//        return;
//    }

  // Look for a single hAtom entry on the page, and iff one is found, extract
  // the entry-title in place of the document title:
  if(document.querySelector) {
    if(1 === document.getElementsByClassName('hentry').length) {
      title = document.querySelector(
          '.hentry .entry-title, .hentry h1, .hentry h2, .hentry h3'
        ).innerText;
    }
  }
  
  // Grab the text selection (if any) and <blockquote> it in the description.
  if('' !== (text = String(document.getSelection()))) {
    text = ['<blockquote>', text, '</blockquote>', "\n\n"].join('');
  }
  else {
    var s = [],
    metas = document.getElementsByTagName('head')[0].getElementsByTagName('meta');
    for (var i = 0, L = metas.length; i < L; i++) {
      if (metas[i].name == 'description') {
        s[s.length] = metas[i].content;
      }
    }
    text = s.join(',');
    if (text.length === 0) {
        //      silent = true;
    }
    else {
        // I should take 2 minutes to clean this
        text = ['<blockquote>', text, '</blockquote>', "\n\n"].join('');
    }
  }

  // Grab all rel-tag microformats from the page and prefix the tags param
  if(document.querySelectorAll) {
    var tags = [].slice.call(
      document.querySelectorAll('a[rel~=tag]'),0).map(
        function(a) { 
          return a.href.split('/').pop(); 
        }
      ).join(' ');
  }
  
  // Assembles default form pre-fill arguments.
  // Note: 'tags' is not currently supported but should be.
  var args = [
    'http://pinboard.in/add?url=', encodeURIComponent(url),
    '&description=', encodeURIComponent(text),
    '&tags', encodeURIComponent(tags),
    '&title=', encodeURIComponent(title)
  ];
  
  // If silent mode, add the auto-close parameter and read-later flag:
  if(silent) {
    args = args.concat([
      '&later=', 'yes',
      '&jump=', 'close'
    ]);
  }

  var pin = open(args.join(''), 'Pinboard', 'toolbar=no,width=610,height=350');
  
  // Send the window to the background if silent mode.
  if(silent) {
    pin.blur();
  }
  
})();

pinboard.bookmarklet.js

javascript:(function(){var%20b=location.href,e=document.title;if(document.querySelector&&1===document.getElementsByClassName("hentry").length)e=document.querySelector(".hentry%20.entry-title,%20.hentry%20h1,%20.hentry%20h2,%20.hentry%20h3").innerText;if(""!==(text=String(document.getSelection())))text=["<blockquote>",text,"</blockquote>\n\n"].join("");else{for(var%20c=[],d=document.getElementsByTagName("head")[0].getElementsByTagName("meta"),a=0,f=d.length;a<f;a++)if(d[a].name=="description")c[c.length]=d[a].content;text=c.join(",");
text.length!==0&&(text=["<blockquote>",text,"</blockquote>\n\n"].join(""))}if(document.querySelectorAll)var%20g=[].slice.call(document.querySelectorAll("a[rel~=tag]"),0).map(function(a){return%20a.href.split("/").pop()}).join("%20");b=["http://pinboard.in/add?url=",encodeURIComponent(b),"&description=",encodeURIComponent(text),"&tags",encodeURIComponent(g),"&title=",encodeURIComponent(e)];open(b.join(""),"Pinboard","toolbar=no,width=610,height=350")})();