Hi Anonnymous,
Good questions

With a basically unrestricted public availability of the 2007 Office system Beta 2, it would be a heck of a task to have a formal bug reporting system (i.e. fill in all the blocks on a form etc) that could be handled, but here are some ways to provide feedback to Microsoft on your experience with 2007 Office System Beta 2.
A. From within the Office 2007 apps you can
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1. Click the Microsoft Office Button [File]
2. Go to the bottom of that menu and select the Options choice.
3. In the Options - select 'Resources'
4. Use the 'Contact us' button.
The web page there has a feedback submission link.
Also, while in the Options Resources turn on the 'Customer Experience' program tool. The data MS gathered from the last version on usage (anonymous [one 'n' in that spelling <g>] was used to set the baseline on what was changed from 2003 to 2007 and will likely be used for tuning the 2007 version before it is Released to Manufacturing (RTM).
B. COOL 2007 Office System feedback Tool
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Download and install the MS 'Send a Smile' tool from the Download Center at
http://microsoft.com/downloads/details.aspx?familyid=A2E1F4E2-BC0F-4403-B09F-7A677D55F274
Send-a-Smile places two 'smileys' in your system tray.
Smile - to capture a picture of and comment on things you like in the new version.
Frown - to capture a picture of and comment on how something you're seeing might be improved by changing it.
You can capture a screen with a single click and type in details of how you'd improve the apps for usability different from what you're seeing now (may be helpful to also include info on how you use that particular app on a daily/regular or even infrequent basis to set a context for the people reviewing that feedback). After you type it you can send that feedback off to Microsoft where it is reviewed.
You can also capture a frown or a smile using the Keyboard.
Smile Ctrl+Shift+) [Ctrl+shift+zero key]
Frown Ctrl+Shift+( [Ctrl+shift+9]
C. The Peer to Peer feedback
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The discussions here in the public MS Office Community/newsgroups
news://msnews.microsoft.com or
by browser
http://microsoft.com/office/community/en-us/default.mspx
I'm looking forward to some feedback, discussions, friendly point/counterpoint on how somethings work, if they're easy to find (even if 'awkward' at first.
============Microsoft Beta 2 is out. Everyone knows that Beta means the software is on the testing stage and there could be some errors or unfunctional functions.
But my question is, why you don't allow people to "report a bug"? So why giving the people possibility of testing the software when they can't even report back what went wrong (if any).
I am sitting here for about 30 minutes, trying to find a button to report back some issues. no, there isn't any except "report a rendering problem!" Is this the only issue a beta program has? or are you so sure that the office diagnostics can catch every problem inside the office?>>
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Let us know if this helped you,
Bob Buckland ?

MS Office System Products MVP
Pricing and Packages for '2007 Microsoft Office System'
http://microsoft.com/office/preview