No, I have no plans to use it, but you are free to use it in your custom features if it appeals to you.
For me it doesn't scratch any itch that I'm feeling and it falls into the same category as why I don't use O/R Mappers in mojoPortal.
I do like LinqToXml and other useful Linq things, but LinqToSql doesn't appeal to me personally.
Best,
Joe