scooby_dooby
Legend
Which particular features are you talking about ?
Many of these technologies and services exist today in the form of 3rd party solutions.
I'm not sure if the delay is caused by dependencies on third party (e.g., interoperability testing), missing Game OS functionality (e.g., preemptive multitasking due to Cell's newness ?), operational and business requirements, or something else (e.g., working on some areas to leapfrog).
EDIT: Note that they have just released PS3 3-4 months ago, there may be a lot of complexity and priority conflicts due to the way different things are layered together, and the fact that Sony is rolling them out together.
The basics:
- universal friends lists built into OS
- alerts when friend(s) come online
- standard method for invites from any game