My post on laser arrays for low cost launches is part of the carnival
The pricing of the SpaceX Falcon 1 and 1E rockets is discussed by Space Transportation news.
The Falcon 1 can launch 670kg to Low Earth Orbit. So at a $7 million price tag that is $10,000/kg. The Falcon 9 variations at prices of $35-78 million to launch 8700kg to 24,750kg translates to pricing of about $3000-4000 per kg to low earth orbit. The Falcon should have test flights in 2009 and could be ready in 2010 or 2011.
Colony Worlds discusses the long term possibilities of Jupiters moon Ganymede There are a total of ten posts on space in the carnival of space week 2.