Q:High Performance/ High Availability Firewalls

[Uwe Zirpner <Uwe.Zirpner () rsw sni de>]

Hey folks,
I'm searching for more information about High Performance Firewalls 
e.g. in an ATM network environment or setting up an expandable load
balancing firewall ( e.g. parallel firewall ).

I just read two interesting papers of Uwe Ellermann & CO.( DFN )
about this topic, but does anybody has had already some experience in 
implementing such a firewall.

Which system requirements should the firewall hardware have to handle
the ATM Traffic througput ( e.g RAM, Processors )

The site has roughly 2000 Users, mainly classic WWW/FTP/MAIL traffic.
The firewall should have minimum 4 network cards.
- Internet, Internal net, dmz, extranet

As far as High Availability is concerned,
I would like to combine the "Load Balancing topic" with this topic.
Is this possible ? Any recommendations, NOT TO DO

For High Availability
 I only know StoneBeat for Firewall 1. Are there any other products
or concepts for other "Well Known Firewall Products" out there ??

TIA Zirpini