I took a closer look at the
http://www.tsviewer.com solution, they actually have an option to generate viewer code in HTML only. Again, you have to list your server but it can be set to private. Then you just go to the 'Code Gen' section under your server, pick size/colors, and copy/paste the HTML given into an IMPortal block. Eazy peezy.
Has a pretty good look to it.