▐■▬ Translucent-izes the navigation bar at the top of Google's homepage (not iGoogle, just the main page)
▐■▬ The main search bar glows if you hover over it, and glows even more when it's focused.
▐■▬ The "Google Search" and "I'm Feeling Lucky" buttons glow, too.
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▐■▬ EDIT: This badly needs updating! Use http://freestyler.ws/style/26059/google-home-page-os-x-style in the meantime – it's vastly superior to mine anyway. ;)
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▐■▬ comment please, even if you're not rating my userstyle! I need feedback from anyone who's used this and discovered the defects.