This is the first of a series of Episodes on Software Architecture. Alex, Michael and Markus talk about rather fundamental topics in this episode, we'll go into much more detail in subsequent episodes in that series. Topics in this episode include:

What is architecture, how is it different from design
what different kinds of architecture are there in addition to software architecture
the role of the architect, do we have one or more?
architecture in agile software development
tasks of the architect
architect vs. the technical project lead
architecture and project politics
architecture requirements, estimating, team assembling

There aren't too many good references for this general architecture discussion. You might want to take a look at Software Architecture in Practice by Len Bass, or, if you speak German, at the book Software-Architektur by Vogel, Arnold, Chugtai, Ihler, Mehlig, Neumann, Voelter and Zdun.