Ok - so hot on the heels of open social, is something which is very exciting ... Android.
I've attached the video below, but basically Android is an open source stack for developing applications on the mobile phone, backed up by an alliance of interested parties.
Obviously providing a standard framework for building apps on a mobile phone is a big thing ... however there are two more things I wish to note. First that Google APIs will be available on Android. I assume this also means OpenSocial in the future?
Secondly, that XMPP support is provided. More P2P applications and bitTorrent for the mobile phone? Excellent.
Watch the video ...