Office 2010 and SharePoint 2010 are about to receive their first Service Pack (so those that always wait until Service Pack 1 becomes available can finally start using SharePoint 2010!). Details about what is included can be found here:
My understanding is that it will also include a feature to determine where space is being utilized in SharePoint sites. This was a very handy feature of the previous version of SharePoint that mysteriously removed from SharePoint 2010. We will have to wait and see what it actually is when the service pack is released but if it is included then it will certainly be a major benefit to SharePoint 2010 admins of all shapes and sizes.