Feature 1 SharePoint 2010 : Sandbox Solutions

This feature i am sure is one of the big enhancement in SharePoint 2010 . For all those developers out there who gave day and night to convince server admins that the developed code is safe and won't break the farm this is sign of relief.

Now the developers / Site administrator can get their custom code(restricted features) to the SharePoint site without concern .So in case there is bug in code then the only thing which will bomb is site owned by the team .

Farm administrator has total control over the deployed solution and can even define resource limit for the solution . It's win - win for the server admins as well as the site owners.

Less politics in organization now ;-) .

More details here