Very interesting discussion. I myself use SN10 + PDA(SeeYou). Besides
what have been mentioned, SeeYou also leaves traces which are useful
to come back at exactly the same place in wave, etc.

I think the original question is easy to answer.. You can buy
everything you need to make the cable at Radio Shack for less than
$10, so just go for it and see if you like it.

-Gen