I like it a lot :-o
I was thinking about moving the pin on a fixed frequencies bar, but to move the bar like a contacts list with kinetic scrolling is way better.. x)
I would just make it possible to tap on the current frequency (displaying it in a little box like the browser address bar), so that you can enter manually the numer you want.
thx a lot to all who work on this (pycage in particular I assume)!