Please try out slidescroll. The applet is at the top left. Click on a node to see it in action and notice the smooth scrolling, and how web pages appear in the large window.

Put this applet on your site for FREE. Here's the source code: slidescroll.java, slidescroll_canvas.java and slidescroll_item.java. Check out the help file. Get the zip file that contains everthing you need to put it on your site: slidescroll.zip.