I sent myself an invitation at school to collaborate on my trial document in Google Docs. This is the message I received:
I've shared a document with you called "Trial of Docs and spreadsheets": http://docs.google.com/Doc?id=dfgzcs4m_1hcv4hj&invite=fvhngqb It's not an attachment -- it's stored online at Google Docs & Spreadsheets. To open this document, just click the link above. --- Try Google docs - a collaborator
When I clicked on the link, it said that editing was currently not available, but I could read the document until editing comes back. Maybe that's why I am having trouble getting the item posted at this point in time.
To be continued...