Sadly it won't make the bus smell any better, but Shift has finally made it's transistion to a none Flash platform - Two versions, a "lite" and a full version.
To call it a lite version is a bit misguided though, it's as long as the original Flash game, so pretty substantial for a demo version.
Then if you really like it you can buy the full version, which contains 25 additional levels made for the iPhone version for 99 cents. Which makes it a great little time waster. Only you won't feel like you've wasted your time, because it's excellent.
Also I think today would be a good day to finish Shift 4.
You can download it right here: i-SHIFT Lite
And the full version right here: i-Shift Full version
Full details at www.armorblog.com!
So everyone with an iPhone or iPod touch, give it a whirl, it won't cost you anything...