Intro
Adam Bosworth has an interesting post in his blog named Adam Bosworth paints the big picture about SOA.
More comments about the same presentation in CTO Forum: BEA exec hails service-oriented architectures
Clemens Vasters has a 2 hours presentation here. The ppts are here.
Some comments on this presentation:
- There are no more 'green field'. You can go to a company and start an application from scratch, you always need to integrate with something.
- There are no 'legacy applications'. A company is always in an evolution process so the todays applications need to integrate with tomorrow's one and the this ones with the past. Applications must be designed for integration.
- You can't choose the perfect platform and move everything to it, because in the future the perfect platform will be another.
Note: these comments fit perfectly with the GX messages 
.
More info in here.
SOA Issues
The Entity Aggregation Problem
Data On The Outside Versus Data On The Inside