[skyking]

I know it is late, but I would add that it would nice to think of things that:
1: is compact enough for inside commuter trains.
2: can survive a trip on the front of a bus.

I know those are tall orders.
I did a year of combined commuting to Seattle from Puyallup. Some days and legs required a bus trip, most involved stowing in the train.
Here's my commuter for those days, as it sat on the train. I had to carry it up 3 flights of stairs when I got to Seattle.