You've said many times you want simple, but I don't think that first train illustration is simple! It would not reduce down to half an inch very well (one of the marks of a good logo) because of the cow catcher (I think that's what it's called) and all its detailed lines.
The second one works better, but the area behind where it says Station is too busy/distracting. I think the blue part is an S on its side, but that's not clear and it makes reading the name Station difficult; figuring out what the blue is competes with reading the company name. Also, it's very straight. It could be a lot more exciting if you add some curves!
Rails =
Ruby on Rails right? Why not make the logo red? Also, it doesn't really say "technology" to me. Is that one of the requirements?