IE9 beta users will have to follow few steps to login and use SiteJazzer.
Here are the steps:
1. Open SiteJazzer http://www.sitejazzer.com/app/web/login.aspx in IE 9 browser
2. Just besides the link you will see the compatibility view button. Click this button to make your new browser compatible for SiteJazzer application
Please find the image that will help you find the ‘compatibility view’ button. 
The button with red border represents the ‘compatibility view’ button.
3. After following step 2, you can create new jazzer’s using SiteJazzer. You can save, preview, publish, download and share the jazzer’s with your new IE9 beta version.