David Czarnecki responds in detail to some reader comments in my October 2003
Blojsom vs. Roller post.
Things have changed a bit in the months since that post.
Roller and Blojsom are becoming more alike in terms of features, but the architectures
are still very different. Roller is classic database-driven J2EE webapp with the patterns
and the frameworks and the associated warts.
Blojsom plays off of the extensible and file-system based Bloxsom architecture.
Both of these architectures have strengths and weaknesses.