Molcga:
#1. Features are most likely completely set, so not many changes besides bug fixes, so now is the time for 3rd party developers (e g Daemon Tools) to report problem. So it is a very good time to start doing this, which the DT deveopers are doing as well

Better to wait for something stable so do not push DT developers too much. (keep up the good work)
#2. Se #1
#3. Win7 beta 7000 is free to use with a time limit(1st August). Anyone can download it (
Download the Windows 7 Beta) and get a personal product key. You can choose to do a clean install or an upgrade, it is up to you. Of course if you want to go with upgrade, you need Vista to upgrade, but most people do clean install on test systems. If you have been fooled to buy the beta, then report this. If you can buy it as media being sent to you, I guess there is a small fee, but download should be free.
#4. Historically (XP, 2003, Vista, 2008), sometimes one or two release candidates are also released to the public after the beta(s) when it is close to RTM for developers/IT pros to make sure there are no problems after beta fixes.
#6. I run Win7 on all my computers since the 7000 beta came out and I have had not stability problems. Newer and more drivers included should probably make it better for most people. I have only had a problem with Acrobat Reader that don't open PDF files inside IE windows, but FoxIT does a good job or Acrobat Reader standalone open. I have had a few applications that won't install(e g DT), but then I have been warned and cannot install them, so I have (been forced) to avoid stability problems.
#7. Yes. All companies want to be ready, else customers switch to other similar products that work today.