Some updates on Adobe CS5:
- CS5 will support 64bit, however it will not support PPC anymore
- It will be faster and will therefore require more RAM
- It will also have a programing interface for Adobe Flex and it will support Java script & shell script.
- It will have a module system for ad-ons just like Lightroom
- It will be easy for developers to create additional plugins.
Here is an old video on CS5: