Some may know that Windows 7 comes with a variant marked 'N'  (media player unbundled). Aside from the unbundling, as far as I know, the oporating system is the same in every other way

BUT.....

SharePoint 2010 does not install on Windows 7 <version> N. So even if you install Windows 7 Enterprise N (as I did today) you cannot install SharePoint 2010. As far as I know, there are no work arounds & the issue will be addressed in the RTM

Until then, if you want to run SharePoint 2010, make sure that not only do you install the appropriate version of Windows 7 (e.g. Professional, Ultimate, Enterprise) but do not install the N variant

SharePoint SP2 will expire 180 after implementation of the service pack.

Taken from the SharePoint team blog ....

"During the installation of SP2, a product expiration date is improperly activated. This means SharePoint will expire as though it was a trial installation 180 days after SP2 is deployed. The activation of the expiration date will not affect the normal function of SharePoint up until the expiration date passes. Furthermore, product expiration 180 days after SP2 installation will not affect customer’s data, configuration or application code but will render SharePoint inaccessible for end-users"

A KB article has been released on this and a fix is being worked on quickly!

We all make mistakes ...