As with Google Docs or Zoho writer, you can create documents and share or collaborate with others so why even try it?
1) You can export or import existing documents. This includes the various formats; HTML, Word, PDF, Open Doc.
2) You can make the documents pubic or private for sharing. Collaborate with students privately and then make the final work public if you want.
3) It works well on mobile devices! (Google Docs is great but requires at least a netbook to use effectively.) I have tried this on both my Android phone and my Nokia n810 and it works well. So now you can collaborate wherever you are as this tool is very lightweight in terms of the resources it needs to run.
Let me know what types of results you find and if it helps in your classroom.