Big news at the MWC:2010 today, Nokia and Intel teamed up and merged their platforms Maemo and Moblin to form MeeGo. 
MeeGo is an open source project and is hosted by the Linux Foundation which encourages community contributions.
Project releases for MeeGo version 1 are expected in the second quarter of 2010.
You can find out more on their FAQ page over here.
While you’re at it, have a look at the Qt blogpost welcoming MeeGo at this link.