Do you know a web page or pdf or any books to learn how to architecture these products to create a farm?
Also any generic web application farm architecture best-practices source is appreciated ...
I would like to learn about highly available and scalable web architecture especially using IBM products...
Look at the IBM Redbooks site, maybe WebSphere Application Server Network Deployment V6: High Availability Solutions.
IBM Redbooks publications are developed and published by the IBM International Technical Support Organization (ITSO). The ITSO develops and delivers skills, technical know-how, and materials to IBM technical professionals, Business Partners, clients, and the marketplace in general.