Every man and his dog seems to be adding an implementation of LINQ to something.
- http://linqtotwitter.codeplex.com/
- http://blogs.msdn.com/b/aconrad/archive/2007/12/10/linq-to-rest.aspx
- http://linqtowikipedia.codeplex.com/
- http://www.codeproject.com/KB/linq/LINQtoCSV.aspx
- http://mhinze.com/linq-to-nhibernate-in-10-minutes/
it's even been ported to javascript http://jslinq.codeplex.com/
But I'm wondering about other more niche LINQ to projects or implementation that are out there that we should know about.