Simply by having a Google Account then the entire product google it you can exploit:
- Blogger (blogspot.com)
- Feedburner
- Gmail
- Google Alerts
- Google Analytics
- Google Blog Search
- Google Bookmarks
- Google Calender
- Google Chrome
- Google Custom Search
- Google Desktop
- Google Docs
- Google Friend Connect
- Google Maps
- Google Images (Picasa)
- Google Search
- Google Talk
- Google News
- Google Readers
- Google Toolbar
- Google Trends
- Google Translate
- iGoogle
- Youtube
- Google Webmaster Tools
- Google Groups
- Google Code
- Google Adsense
- Google Adwords
- Google Buzz