Thanks for the kind words.
Like Johnny, I asked myself the same question. My primary goal here is to keep my land line number and my secondary goal is to enjoy the free services from Google for as long as they are available.
That said, I choose to port my number to GV because in case there is any hiccup with Google Chat, I can always route my calls to my other phone numbers. If I port my land line straight to CC, then I lost this flexibility. This is, of course, assuming that Google will at least continue to provide call routing. In case Google stops everything, then CC is always there for me.