SharePoint Server 2010 SP1 Download: http://support.microsoft.com/kb/2460045
Why SharePoint Server 2010 is fabulous ?
Below mentioned information has been conveyed by Bill Baer, Senior Technical Product Manager, Microsoft Corporation:
Site Recycle Bin
Service Pack 1 will introduce long awaited Site Recycle Bin functionality that enables self-service recovery of site collections and sites. In the past IT Professionals were tasked with restoring entire databases to recover deleted site collections and sites and would generally require expensive restore environments to support the task. Now in Service Pack 1 administrators can quickly and easily recover site collections and sites accidentally deleted by their owners in a process similar to that of the Recycle Bin we have for Lists, Libraries, and Documents.
StorMan.aspx
In SharePoint 2010 we removed StorMan.aspx (Storage Space Allocation) (see http://support.microsoft.com/kb/982587/EN-US) which in previous versions of SharePoint enabled granular management and insight into storage. For example, the page would show you the top 100 documents or document libraries in terms of size. With that information end users could the page to clean up content from their site(s) by deleting the large content that they no longer needed. In Service Pack 1 we are bringing back an improved StorMan.aspx, enabling users to better understand where their quota is going and act upon that information to reduce the size of their sites.
New enhancements will improve the way you interact with information in SharePoint 2010. Service Pack 1 adds support for working with SharePoint and the Office Web Applications using Internet Explorer 9 and the Google Chrome browser (for a complete list of supported browsers for SharePoint 2010 see also http://technet.microsoft.com/en-us/library/cc263526.aspx), support for Open Document Format documents, and more.
Chrome Support for SharePoint & Office Web Apps
New Powershell cmdlet (Move-spsite) for moving Site Collections between databases without moving content back in the db (when using RBS)
Improved backup / restore functionality for SharePoint Server