I've been trying for a while to add the Wizzley iframe widget to a Wordpress blog post of mine without success, until I found some plugins that did the trick. If the widget is to be featured within the actual post that promotes Wizzley, the iframe tag gets stripped right away.
Btw this applies only to Wordpress posts. You can add the iframe widget code to Wordpress sidebar, as well as to Blogger posts without a problem.
Anyway, just thought to mention that I created a Wizzley post with a step by step tutorial for anyone who is struggling with this like I was. The step is detailed enough that anyone who has never done anything similar should be able to follow it. (Wordpress pros will know this already) Hopefully somebody might find it useful.