http://visualstudiogallery.msdn.microsoft.com/en-us/993df7ed-2dd2-44e4-98f2-e6233812692b

This extension looks very useful!  I haven’t gotten around to trying it out just yet because I am in the process of rebuilding my SharePoint 2010 dev environment now that the product has released.  However, it essentially gives you “Add Service Reference” like capability so you don’t have to use spmetal to use LINQ to SharePoint 2010.  You can see a video walkthrough of this extension at http://code.msdn.microsoft.com/linq2spdsl/.