Like I took this sudoku flake here in this blog:
Choose your flake at www.pageflakes.com and go to edit and press Export button and this will give you a html similiar to this:
<script type="text/javascript" src="http://www.pageflakes.com/CFFlakeManager.js"></script><iframe allowtransparency="true" id="pffid29970474" scrolling="no" frameborder="0" hidefocus="true" src="http://www.pageflakes.com/SingleFlake.aspx?FlakeId=29970474" style="border:none 0px #cccccc;margin:0px;width:320px;height:402px" onload="if (typeof registerFlake == 'function') {registerFlake(this);}"></iframe>
Just Add this to your page/blog anywhere and you will see its working....
for further details you can check this blog post too....
http://www.pageflakes.com/Community/Help/Blog.aspx?ShowComment=1&BlogPost=34
How cool is that.....