Some have asked how to make text flow around an object and typically the answer has been to make separate text blocks placing them over, beside and under the object. There is a way to do this in the code editor without have to break up the text.

What I wanted to do was to float a adsense unit to the left within text. This does involve a bit of html knowledge but is really straight forward and not hard to do.

Open the code editor and paste your text in there. Pick a place where you wish your adsense or whatever you're floating and paste this code there.
<div style="float:left; margin-right:1em">
Adsense code goes here
</div>
The '1em' will move the adsense unit to the right a little, can move it more by making this number larger. Can also change the 'left' to right' to place on the right.

Now your text will flow smoothly around the adsense unit. Here's a quick example I've put up.
http://www.seknow.com/investment-advice.html

You'll probably want to format the text with some control like this:
<div style="font-family:arial; font-size:12px;">
Put this part of the code at the top before the text.