Will Dom3 be sold at retail outlets?

[DominionsFan]

Thilock_Dominus said:
Tuxgames.com (linux game online-store) sells Dominions 1 and 2. and they are going to sell it Dominions 3 as well
Tuxgames
They are located in UK, so things like extra taxes to us european can be avoided.

Well I've already pre-ordered the game, just like many of my friends. I still know some people who plans to order the game after they've seen the demo. So can I say to them that they can order it from tuxgames? I mean, they will only have a linux version, or there isn't a separated Linux version of Doms 3. at all? I guess there will be only 1 master disk with Linux/Windows/Mac install files.
I just only want to tell them about the site, because they could get it much faster from the UK then from the US, if they decide that they would like to order it as well.