Facebook
Social Networking Websites

Status: Currently Using This
Reason: More of a community than a "personal webspace".

Gmail
Email Services

Status: Currently Using This
Reason: IMAP/POP- Integrates well with Opera web browser. No ads in POPmail.

Pandora
Music Discovery / Recommendations Websites

Status: Currently Using This
Reason: Smart playlists. Great for finding new bands.

PRWeb
Press Release Distribution Services

Status: Currently Using This
Reason: Custom RSS Newsfeeds, organic SEO benefits.

Slashdot
Product / Service Reviews Websites

Status: Currently Using This
Reason: Tech news & commentary. mostly, commentary.

TechCrunch
News Websites

Status: Currently Using This
Reason: Tech leads, business news.