Hit-Counter.net
Offers web site reporting and return on investment analysis.
http://www.hit-counter.net/

Rackspace Managed Hosting
Supplies a number of solutions for dedicated hosting, server management, firewall protection, and web hosting services.
http://www.rackspace.com/index.php

Site Confidence
Providing web site monitoring and performance testing to check download speed and availability, providing alerts and advice.
http://www1.siteconfidence.co.uk

Website Down Time Monitor
Offers a free monitoring service to check a website`s uptime, and make sure it stays online.
http://www.down-time-monitor.com/

Website-backup.com
Provides website back-up and failover services.
http://www.website-backup.com/