http://blog.us.playstation.com/
Will voice-messaging/private chat be featured in 2.40 as well? If not, can we expect to see this feature added in the future?
We are evaluating the opportunity to offer voice chat, but for this update, we wanted to focus on text messaging as the key priority for communications that our users have asked for.
Can you use the web browser in game?
No, you must exit the game before browsing the internet.
Will In-Game XMB come up during playback of PS2 games, Blu-Ray discs, and DVDs?
The XMB is an exclusive feature for PS3 game titles. Accessing the XMB during gameplay was the top request from our users, which we focused on for this update. However, we continually engage PS3 owners for feedback and will evaluate the opportunity to offer XMB access during movie playback in the future.
Can we go to the display settings and change anything there in-game (resolution, input, etc)?
No, you must exit the game before changing these settings.
Will it be possible to change in-game the sound output?
Yes, sound output changes are supported.
Will we be able to access the PLAYSTATION Store while in-game?
No, but you can view your downloads in progress.
Will we be able to stream music (either via media server or USB drive) for custom soundtracks or is it relegated to music stored on the HDD
Currently only music stored on the HDD is accessible in games that support this feature. We’d also like to reiterate that Firmware v2.40 merely enables custom soundtracks. It’s up to developers to include this feature in upcoming games (or to patch existing ones).
Does 2.4 enable cross game invites? Will it down the line?
No, cross-game invites are not available in this system software update. We are evaluating opportunities to expand on the new features delivered in 2.40.
Will trophies be mandatory for all games release here on out?
We are working with developers to ensure that Trophies are supported across the board in the future.