poor man's mobile carkit

so... i was using the kid's car to pick up an electric-powered atv for dolan's birthday (another story), and noticed that brennan had one of those $10 car cassette adaptors plugged into the tapedeck (it's a late model car) so he could playback tunes from his mp3 player. waiting at a light, i plugged the adaptor into the headset jack on my n95 to listen to my tunes since, lacking sirius, the radio selection kinda sucked. took me less than one lost prophets track to wonder why the setup wouldn't work as a handfree solution for calls as well. and, well, it worked like a charm - i could hear megan clear as a bell via the car's speakers and she had no problem hearing me with the n95 resting in the cup holder. no doubt there are countless folks out there who've already figured this out, but i still found it to be quite cool. sure, a bluetooth headset or carkit is a more elegant solution, but hey, this works too - and quite well.