<declan_murphy@hotmail.com> wrote ...
> 
> I gave up this morning, so asked the brains trust. All I got was
> 
> 「トン」の意味がどうして「タクシー」なのかはちょっとわかりません。
> 
> Not much of a frigging brains trust.

Ah, but it's only _ちょっと_わかりません。 ;-)