OCLC pointed to this timely article:
The Seven Digital Sins of Online Collaboration
1. Disorder
2. Clutter
3. Reinventing the wheel
4. Inconsistency
5. Automated miscommunication
6. Aimlessness
7. Incivility
Read the post if you work with people instead of machines.
Stephen

One Response
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For web conferences you should try http://www.showdocument.com ,
Great for online teaching and collaborating. I use it for working on my designs with other in my field.
Its free and pretty simple – you just upload your file and invite others to view it together.
– Laura W.