I emailed the Lindows team a few days ago asking where the source code is. And they gave me this link. It appears to be valid. But all Lindows is, is a Linux distro based off of Xandros. they took a Xandros beta and tweaked it to look better. Xandros and Lindows use a variant of Wine(Crossover Office with some tweaks) to allow Windows programs to work.
IMO, I'd rather have Xandros than Lindows, becuase it seems as though Lindows simply ripped off Xandros to make money.