I have to reinstall all my software if the upgrade to Windows 7, huh?

I'm on the fence with installing the beta version of Windows 7, and I'm sure what I'll be ready if I decide.
  So I would have to reinstall all the software, right?
  (PS: If anyone is using it, a recommendation of whether I install it would be appreciated: D)

How to back up my computer before installing Windows 7 Beta?

I'm running Vista and am trying to upgrade to Windows 7 beta, but I wonder how complete and save my team is first in case it suffers the beta version of Windows 7.
  Therefore, I have a backup program documents, basically, everything in case i need to return to Vista.

Will Windows Vista users get a free upgrade to Windows 7?

Wow! After using the beta version of Windows 7, I am very impressed. Only one last question that you should know. Will Microsoft be given free, discounts or upgrades of Windows 7 for Windows Vista?

Help! I want to download the beta of Windows 7, I already preordered the updates of Windows 7, will the upgrade work?

I want to download the beta of Windows 7, but preordained the upgrade, the upgrade will still work if you install the beta version of Windows 7?