One newsletter I highly recommend is the Mustard Seed Sampler from Mustard Seed Associates.
In 2009, topics have included:
Encountering the “Other”
Suburban Missional Church and Rural Intentional Community
Community and Cohousing
They explain their mission better than I could:
Mustard Seed Associates (MSA) provides resources and a network for other committed Christians to anticipate the future, decode the culture, convey the Kingdom of God, and create new ways to be a difference and make a difference.
We work to inspire, connect and create in order to fulfill our mission… Believing God is changing the world through mustard seeds – the seemingly insignificant – MSA seeks to unleash the creative potential of ordinary people to make a difference in their communities and a world of urgent need.
To signup, go to http://msainfo.org/seed-sampler/