I have written a plugin which will, among many other powerful features, allow you to insert any of the currently available 291 Google Webfonts into your posts and pages. This thing is POWERFUL!
You can check it out here:
If you use it, and like it, please leave a rating and click the "Works" button on the plugin download page.
I think this plugin will help many people who have trouble using the visual editor when writing their posts and pages.
Thank you, and happy blogging!