MeeGo: open development and upstream involvement

My N900 needs to be charged between 1 and 2 days of use. That's with a few phone calls (I'm not talking for hours), and less than an hour of Internet usage (just checking some sites, reading LWN.net from the train ;).
Some features (VOIP among others) seem to drain the battery though, but it's more than a working day which is good enough for me.

Basically:

* 2G connection 24/7, but never used for internet access. Only very rare and short phone calls.
* WiFi connection at least 12h / day, with Jabber and Skype accounts active.
* Occasional SMS / instant messaging.
* Checking for and installing package updates every day.

From what I've read, the worst power wasters seem to be:

* Anything that keeps the CPU out of sleep / low power states for significant fractions of the time, e.g.
- badly programmed desktop widgets (I only have the calendar, conversations and OMWeather widgets on my home desktop) or generally apps
- playing videos or music, in particular with not yet well-optimized codecs such as Vorbis
- certain bugs, e.g. https://bugs.maemo.org/show_bug.cgi?id=6868
* 3G radio, in particular for internet access and in particular with some things like Mail for Exchange.

Hope this helps.