Google Toolbar version 5 Beta for internet explorer is now available for public downloading, most notable updates in this version include:

• Access to the toolbar settings from any computer with your Google Account
• Keyboard navigation and access keys.
• Better suggestions for broken links.
• Add gadgets to your Toolbar
• Multi-profile auto web form filler
• Clip content as you browse the web (Google Notebook integration)

Here's the official video:

Download the beta from the URL at the end of the video.