Covad: Firewall Services
Affordable Internet Service Built for your Business. Free professional installation & routers.Up to 2X the upload speed of many standard DSL services.
http://www.covad.com

Top Layer: Network Firewall Solutions
Provides businesses with network firewall protection and performance against worms, viruses, trojans, DDoS attacks, and Microsoft vulnerabilities.
http://toplayer.com

CyberGuard
Provides several appliance firewalls to shield data and network systems.
http://www.cyberguard.com/

2-spyware.com
Manual and automatic removal of spyware, adware, and worm parasites. Contains databases of known parasites and files.
http://www.2-spyware.com

3 Geeks and A Mouse: Virus Protection
Provider of computer repair services, including virus detection and elimination. Nationwide service.
http://www.3geeksandamouse.com