Wait, TT is coming out for Android (or iOS)? That sounds like it'll be either super rad or a huge disappointment. I tried playing a straight port of OpenTTD on my phone a few months ago, and it was pretty much unplayable. It ran decently, but the interface was just not suitable for a touchscreen (at least a phone sized one, maybe a tablet would have been easier).
But back on topic, I have been playing Pocket Trains for the past few days. I'm enjoying it as a nice little time waster to play in bed. Not too keen on the fuel mechanic, but you get bux so frequently (especially compared to Tiny Tower) that it's never much of a problem.