SharePoint 2010 RTM English bits went live last week (official launch on May 12). Though it will only be available for general use somewhere in June, you can try out SharePoint Foundation (previously WSS) and SharePoint Server using the links below.
- SharePoint Server 2010 (Requires MSDN subsription).
- SharePoint Foundation 2010 (x64 | Free)
- SharePoint Designer 2010 (Free) - x64 | x32
