I just read an interesting article about using Gmail for bookmarks, a personal database, and more. You can read about it here:
After recently moving from Outlook to Gmail this was an interesting read. Outlook still rains supreme for managing all of my contact information but Gmail really allows me to manage my email more efficiently. For some reason Gmail makes sorting through my emails much quicker. I rarely have more than 3 or 4 messages in my inbox when I’m done and I get hundreds of emails per day.