I'm still all for getting on Steam.
As far as the process, I followed Bill Harris' development from the beginning and was a part of the beta process (my name is in the credits, woot!). He never expected to get into Steam and he did, so I think you could too, especially with a prexisting game series.
You should check out Bill's blog and see all he went through. I believe this post is most apropos of getting on Steam:
Dubious Quality: Gridiron Solitaire #89: A Deep Breath