Here are some release notes from Daniel Escapa:

• It is a patch update, that means that you _must_ have Office 2007 Beta2 installed on the system.
• The patch for OneNote will include the patch for all of Office so you don’t need two downloads.
• Since it includes both products (as well as others) it will be big! ~495 megs (English version) so be ready with your downloads
• It will be free, no charge for the download
• Make sure that you install the newest version of WDS so that search works great in OneNote & Outlook
• Make sure to download the PDF+XPS addin if you want to publish to those formats
• Per usual you can open notes created in OneNote 2007 B1, B1TR, B2 & B2TR but once you open the notes in OneNote 2007 B2TR they will be updated to the newest version of the OneNote 2007 file format. You will not be able to open B2TR files in B2, so if you are really cautious you might want to make a backup of your files before opening OneNote 2007 B2TR for the first time. I don’t do this but then again I am not that cautious as some of your are and I don’t store my class notes in OneNote : )
• If you open for the first time since OneNote 2003 then it should take of upgrade automatically however if you ran OneNote 2007 Beta2 at any point then the first boot reg key will still be set.
• Log bugs for issues that you have!

WDS3 Beta 2: http://blogs.msdn.com/descapa/archive/2006/08/22/713234.aspx
XPS & PDF add-ins: http://blogs.msdn.com/descapa/archive/2006/09/14/752951.aspx
Office preview site: http://www.microsoft.com/office/preview/default.mspx
Log bugs at: http://connect.microsoft.com/onenote/
There are a few more very important things:

• The patch itself cannot be uninstalled. You can only remove Office & OneNote 2007 in their entirety, but you cannot revert back to the Beta 2 level.
• Once the patch is installed, you cannot install any Beta 2 program anymore. That means if you e.g. only have OneNote 2007 Beta 2 installed, but want to take a look at the rest of Office 2007 later on, you will have to install Office 2007 Beta 2 before you install the B2TR patch. Once the patch is installed, you basically can’t add any 2007 programs to your computer.
• Keep the beta 2 downloads and the B2TR download somewhere on yourharddrive. Any reinstallation will require you to install Beta 2 first, followed by the patch.
• You should focus on reporting bugs that are showstoppers. Microsoft is aiming to lock down OneNote 2007, so only bugs that have serious negative impact for users will be fixed.
• Synchronize all notebooks first before installing B2TR. You will have to install the patch on all your computers with ON 2007 as well before you can really use ON again.
• There have been important changes made to OneNote 2007 synchronization. These changes affect you if your OneNote notebooks are contained in a folder that is held offline by Windows XP Offline Files. This is mainly the case, if your OneNote Notebooks folder is contained in a redirected My Documents folder. If you are in this situation, then OneNote B2TR will no longer synchronize your notebooks with its ownmechanism, but rather leave it up to Windows Offline Files. That means, that you no longer benefit from the ability to edit the same section at the same time on two or more computers and have all the changes merged. Instead, it is a file level synchronization. Microsoft had to take this step, as they couldn’t get ON synchronization to work well with Windows Offline files. I suggest therefore to use the following approach for upgrading to B2TR:
  1. Make sure that all notebooks are fully synced (open ON and press F9 on every computer, then wait till you see all notebooks with a checkmark) and there are no errors.
  2. Before installing B2TR (on all computers), uncheck Tools, Options, Synchronization, “Disable Windows Offline Files”. Don’t reboot yet. This option has been removed in B2TR, which means that the changes it makes to Windows can’t be easily undone after B2TR is installed.
  3. Close all notebooks on all computers.
  4. Reboot all computers.
  5. Install B2TR on all computers.
  6. Move the .one files on the server (the computer that holds the non-offline copy of them, prob. your desktop) into a new folder that is not kept offline anywhere. For example, I moved my “OneNote Notebooks”folder to the root of one of my drives, as it was beforehand under My Documents. Share that folder in Windows.
  7. Open ON on your server. It might create the ON default notebooks. If it does, just close them all.
  8. Open ON on your other computers, open all your notebooks and adjust the destinations for the filing rules (Tools, Options, Outlook Integration and Send to OneNote).
  9. Now you should be all set to go with B2TR and still enjoy the benefits of the great ON synchronization mechanism.