The Mac App Store version is dead for Snow Leopard, but you can still download 10.6 compatible builds directly from the developer portal.

I tried pretty hard to find that, since I'd been able to do that for a previous version, but I came up empty. If you're telling me I could have avoided giving up SL, I'm pretty sad about that.

I tried as well. There does not appear to be a download link available anywhere for free. Everybody keeps saying you can download it, but I don't think anybody actually has in quite some time, and nobody has posted a link.

Visit http://connect.apple.com

It has ALL versions of Xcode.

Which seems to confirm that XCode 4.3 isn't available for SL :-( .

Yes, I think with XCode 4.3 I had to upgrade to Lion from Snow Leopard.