After searching the forum with no result, I feel I should post. This topic could be already discussed or unrealistic, either way it'd be great if OTTD was featured on Steam! I expect the player-base to explode, seeing it has 25 million users and supports dedicated servers. One problem though is that commercially, OTTD has not much to offer. After all Steam is not charity, so they might oppose "open" content. Apart from that it's likely I'm overlooking some technical difficulties, of which I'd like to hear about. Anyone who is interested, visit:
SteamworksBrochure2010.pdf
In my experience it helps a lot if the people at Valve itself know about the game (see GMOD, Peggle, Trine etc.). It'd be great if someone who does feel entitled, contacts Valve to explain the awesomeness of OTTD
Allow me to paraphrase Gabe Newell:
Is it possible that in the near future one could see:
???
I'd even pay for that!