LINQ to SharePoint 2010
Support for the new SharePoint 2010 Microsoft.SharePoint.Linq.DataContext would be awesome!
It would be nice if the LinqPad for SharePoint driver was included out of the box with LinqPad.
Just go to codeplex at linqpadsp2010driver.codeplex.com and download the latest driver for SharePoint.
If anyone is intererested in writing a LINQPad driver for SharePoint, info is here: http://www.linqpad.net/extensibility.aspx