If you really want to put a poll in a post you need a way around the restrictions on javascript in a post.
For that I've used inline-js (http://www.ooso.net/inline-js) I had to modify it a little for my needs it correctly escapes <script> </script> but not <noscript> </noscript> so you either need to edit the code provided by MicroPoll, or modify the php code for the plugin. Only do this if you can totally trust the authors of your site. Allowing javascript enables creation of cross-site-scripting attacks.
If you want to display results in line you'll also need a plugin for embedding flash - I use kimili flash embed
If you don't maintain your own site where you control the code base and available plugins, you may not be able to use these plugins. Check to see if there are similar plugins provided on the site.