After I saw this, I had to make something like it that's completely contained in the uri itself.. :D
data:text/html;,<textarea id="txt" cols=80 rows=24>hello there</textarea><br><input value="get link" type=button onclick="(function(){document.location.href=(document.location.href.replace(/24\>.*<\/textarea>/,'24>'+document.getElementById('txt').value+'</textarea>')); }())">