Adding a Custom Favicon (Unofficial Google Sites Help)（情報元のブックマーク数）

GoogleSitesがFaviconに対応したとのこと。実際にやってみると出来た出来た！

As of July 15, 2009, Google Sites officially supports the ability to customize the favicon for your Google Sites website.
kccloudsolutions.com [14]

サイトの管理から添付ファイルでトップレベルにfavicon.icoを設置するだけで完了！

Adding a Custom Favicon

The following steps are all that is required to take advantage of this new capability:

Navigate to the Attachment management section of your site (More Actions >> Manage Site >> Attachments)

Click Upload

Click Browse and select your favicon.ico file

Your favicon file must be named "favicon.ico"

The apple-touch-icon.png file is not currently compatible as a favicon for Google Sites.

Choose the option to Upload attachment to / (top-level)

Click Upload

kccloudsolutions.com [14]