If (like me) you use a lot of HTML to format text when you are entering messages or comments, or pretty much anything else on Multiply, and other pages that allow HTML on the web, typing the embedded codes <i>in italics</i>, <b>bold</b> or inserting an image: <img src="http://images.jupiterimages.com/common/detail/96/27/22182796.jpg"> can get tedious very quickly.
If you have an iGoogle account you can add this little gadget to your iGoogle page and simplify entry of HTML - it's like a mini-word-processor with an option to view the HTML source which you can copy and paste once you have the format you want.
Quick and easy. Gets my vote.