Comments Rich Young has some links to articles about the details of the sneak peek of After Effects CS4 shown at IBC 2008:
AE Portal post about After Effects CS4
The official announcement, including the announcement of the release date, is on 23September2008. More information is here.
I’ll be posting extensive details of the new version on the date of the announcement, and I can answer any detailed questions then.
As always, you should watch Michael Coleman’s Keyframes blog for information about After Effects.