1. Set Notification Rules
3. Highlights at Revision Tab
An other thing: Suggesting in cells:
they all look really good features. especially the gadgets.
Visualization API is live: code.google.com/apis/visualiza ...
Last week when the chart api update was, I had been thinking they should make it possible to have gapminder-like charts and one of the gadgets does exactly that, great!
Still I would rather see that they make chat possible in documents and presentations and that a single document could have spreadsheets and presentations included.
Is it required for visitors / viewers to have a Google account it they want to use notification by email? Would be great if anyone could enter their email address to get notifications about changes in the document. Kind of a email list instead of Gogle groups.
To collaborate on a spreadsheet you need a Google account. The notification option is only available to spreadsheet creators and collaborators, but you can forward the notifications to other people (in Gmail you can create filters that automatically forward messages that have a certain pattern).
Been waiting for autofill/suggesting in cell, yay!
Not related, but I love the auto color cell feature, not sure if this is available in excel or OOo.
Still waiting for filtering.
Will have to test the new chart, I didn't like the border of old charts.
It seems there are serious security troubles, here:
1. create a spreasheet
2. add a gadget such as an interactive table
3. add the gadget to iGoogle
4. share the iGoogle gadget with an other iGoogle account
5. delete the gadget from your spreadsheet and your own iGoogle account
6. make sure the spreadsheet is nor public neither shared
7. access the other iGoogle account
All your data are still there, displayed and updated without any authorization.
I can't re-take control over my information, make them strictly private and even know who can access them. Can we trust "this document is not yet published"? Don't think so...
The previous example may be very dangerous:
You share a doc temporarily. If the guy who had this authorization has added a gadget and opened it in his iGoogle page before removing it, your spreadsheet is definitely dead since making your doc private and removing all authorizations won't secure it anymore. You can't know that someone still has access to your data and can share them with anyone, because gadgets and their settings can be shared by mere URLs.
There are probably many other security breaches.
I followed the steps from your post (the fifth step seems unnecessary) and I got "access denied" in iGoogle for the second Google account.
I verified several times the steps with the "Table" gadget by Google (an interactive table with filters and grouping) before posting anything here. I tried again after Ionut Alex. Chitu's comment, and got the same 'access denied'. Perhaps I was wrong, perhaps it was a bug in my spreadsheet...