sorry- I'm kind of telling a couple of stories here rolled together!
Although my Portadisc is my nominal fullsize recorder at the moment, when I'm using the single point stereo I'm recording to my Sony MZ-RH1 (linear PCM) as it fits in my jacket. Although I do use this arrangement for gigs, it's not the primary use. I'd use it for city and people sounds (subway train and such)- anywhere I want an environment but it is inappropriate to use my full size rig.
All the nature/outdoor ambient stuff I do uses my full size rig.