Demos/alternate takes/b-sides
 

Sorry if I'm spamming up the board with back to back requests.......

Besides all the reissues (I already own them)...does anyone know where I can get any and all demos, alt takes, unreleased studio stuff, etc? Stuff like the Mirage era Smile At You, for instance.

B-sides and remixes too, if possible. I know there was a handful during the Tango and Mirage eras. I wish they would just re-release those two records with all those extras.

The awesome Ivory Keys page: http://stevienicksivorykeys.blogspot.it/
It's managed by Mike Bise and unfortunately from time to time it gets shut down due to the overwhelming number of downloads, also right now it's being steadily rebuilt.
There's also a facebook page with the same name from which this page stems.

That's awesome. Is there anywhere that hosts the same kind of thing but for Christine or Lindsey?

Not that I know, but I remember that not long ago someone has asked the same thing and apparently Lindsey's and Christine's demos are much less than Stevie.
However that same blog has pages about specific albums sessions with all the available material from all the three songwriters, for example the Rumours Sessions, Tusk Sessions, Mirage Sessions, Say You Will Sessions and Greatest Hits-Behind The Mind Sessions are available.

Also, you can find a lot of this stuff posted here on The Ledge for download, by searching thread titles. Many links are dead or expired, but many still work.

For example:

http://ledge.fleetwoodmac.net/search...earchid=648079