The library that this thread is about is here:
http://arduiniana.org/libraries/tinygps/
The GPS Logger shield from Adafruit works great, and has working sample code.
I have some notes on my GPS project (that includes logging) here:
http://hiredgunsoftware.net/wp/?tag=gps
I haven't posted the code yet, since part of it is incomplete, but I'd be glad to share what I have.
Rob