What info does Google backup? Does anyone know what exactly does Google backup (and restore) when you enable that option?

Also, are we able to see this list somewhere? (Maybe hidden n-levels deep in Google Account information?)

Reason I ask is I've had the unfortunate experience of my SD Card dying on me, put in a temporary SD Card and allowed Google to do the auto-restore.

Some things that were restored:


Saved wireless networks
Background
Some apps - strangely enough only a subset of my apps were restored (some with data, some without). All previous apps were installed via Android Market.


Then finally got my new SD Card, put that in and the following were restored


Saved wireless networks
Some apps - again, same problem... only a subset (different subset, even fewer apps). This time no data seemed to have been restored either.


I think it would be very helpful to be able to view/manage a list of what is backed up, and thus would be restored (but I have yet to find this list... if it even exists).
For Honeycomb (Android 3.0+) devices, the official Android 3.0 (aka Honeycomb) user's guide says:
Page 13

Backing up and restoring your data
...
Many kinds of data are backed up, including:

Your Android settings, such as your Wi-Fi networks and passwords, user dictionary, and so on
Many Google application settings, such as your Browser bookmarks
The apps you download from Android Market

Some third-party apps also make use of the backup service, so if you reinstall one,
its settings and data are restored.

Page 132

Back up my data Check
to back up some of your personal data to Google servers, with your
Google Account. If you replace your tablet, you can restore the data
you’ve backed up, the first time you sign in with your Google Account.
If you check this option, a wide variety of your personal data is
backed up, including your Wi-Fi passwords, Browser bookmarks, a list
of the applications you’ve installed from Market, the words you’ve
added to the user dictionary used by the onscreen keyboard, and most
of the settings that you configure with the Settings application. Some
third-party applications may also take advantage of this feature, so
you can restore your data if you reinstall an application.

As for your list of apps, you can easily see which ones are linked to your Market account by going to https://market.android.com/mylibrary