Bump.
Its not illegal, technically. La-Mulana is indeed freeware, therefore, the soundtrack is free to post.
Now, this would be a different story altogether if he was requesting the soundtrack for the WiiWare version of La-Mulana. However, this, as of now, isn't even possible, since the WiiWare version of La-Mulana isn't even released yet, nor is its soundtrack.
And, even if I'm wrong and it is, in fact, illegal to post the freeware version of La-Mulana's soundtrack, no one's even deleted the above link, and I've already used it and downloaded all the tracks.
Cheers.