Delicious with a usable text area

usable-delicious.js

// ==UserScript==
// @name           Delicious - input
// @namespace      http://vasilis.nl/
// @description    Embiggens the textarea on Delicious
// @include        http://www.delicious.com/save*
// ==/UserScript==

(function() {
  var el = document.createElement('style');
  el.innerHTML = '#saveNotes{min-height:200px!important;min-width:600px;font-size:16px}.fieldMsg{width:594px!important}';
  document.head.appendChild(el);
}());

document.body.innerHTML = (document.body.innerHTML + bigStyle); could be written as document.body.innerHTML += bigStyle; but still you shouldn’t use it as it will remove all bound event handlers.

Use document.body.appendChild(bigStyleElement) instead, or even document.head.appendChild(bigStyleElement).

Update: I meant something like this:

(function() {
  var el = document.createElement('style');
  el.innerHTML = '#saveNotes{min-height:200px!important;min-width:600px;font-size:16px}.fieldMsg{width:594px!important}';
  document.head.appendChild(el);
}());

Changed the script thanks to mathiasbynens.