Clustering Advice, Software or Hardware

[Neal Kaiser]

We are soon going to develop a J2EE app using Orion and I want it to have 2
webservers for failsafe and load balancing.  In the past I've used load
balancing routers, like the Web Server Director.  Has anyone had good
experience with clustering in a production environment? What are the pros
and cons of hardware vs software clustering?

Thanks, Neal