I use Padlet all the time in my class for a quick sentence or paragraph-level group writing activity - it's easy to share with your students and you can embed it very easily!
http://padlet.com/salinmiso/8tihmalkbcyl
List.ly, according to co-founder Nick Kellet, is "true social curation with lists as a metaphor." List.ly is all about creating and curating lists. You can create lists of tips or lists of websites or lists of anything you can think of that your potential clients would be interested in.
List.ly is an excellent tool for curating web resources. You can then embed these lists into your blog, wiki, or content pages in your institutions learning management system. Other list.ly users can even request to add resources to your curated list. You can sign up for list.ly and it's free.
You'll feel like a superhero.
The above comments are from Padlet's hype...but I recently learned about this tool for collaboration at a conference. It seems to be a wall where you can collaboratively post things. You do not need to sign up for an account to use it.
From the little I've used it, it seems worth exploring.
Lisa