If you've been looking for a place where friends, family or other social groups can get together to talk and plan, Micro Mobs is a messaging service with a focus on small group sharing.
Sign up for a free account and invite your friends — you can email them or invite them through Facebook or Twitter — and you've got an instant private space to share messages and media. Micromobs is designed to offer easy to control and scalable social networking without the openness of other social networks. The emphasis on group-specific communication and networking means your family reunion planning, paintball team musings or workplace joking doesn't end up plastered all over Facebook.
Micromobs is a free service and requires basic registration. Have a favourite tool for small-scale social networks? Let's hear about it in the comments. Thanks Andy!