There is a way (I just had to remember it):
You'll be using JavaScript to a Safari bookmarklet (and, this method only works in Safari, not, say, a note taking app, for instance).
1) Make a bookmark in Safari and title it something like "Scroll to Bottom" (I put my bookmarklets in their own folder on the main bookmark bar).
2) Edit that book mark and put the following in the URL field (copy this and just paste it in ... is easiest). Include the whole line, even that semi-colon at the end:
javascript:scroll(0,document.getElementsByTagName(%22body%22)%5B0%5D.scrollHeight);
That's it. Now, you have a bookmarklet that will jump you to the bottom of a Safari web page. It works on my new iPad running iOS 5.1.
Good luck and holler back if you have questions.
Marilyn