Hello Attila. I was wondering how your swank for Gambit project was coming along.
I remember that you were interested in running Scheme on an embedded device. Have you considered the picobit compiler and VM I wrote? I have used it quite successfully for real-time control of a custom robot (picture below) which has a PIC microcontroller and a few KB of RAM.
Finally, talking about embedded devices, I've recently come across a cheap ($40) and super compact wifi module which contains 2 embedded ARM processors and a few hundred kilobytes of RAM. It sounds like the perfect embedded platform for wireless sensors, tiny robots, etc (here's a link: http://www.semiconductorstore.com/cart/pc/viewPrd.asp?idproduct=47055). I'm thinking of installing picobit on one.
Marc