I was having problems with bluetooth before on my waysmall 400xm-bt, actually I am using an old version of buildroot maybe revision 800 or so. I am using that version because it is compatible with my driver that, for the time being, I don't want to rewrite. I recently replaced the rootfs image, and when booting all the bluetooth messages say that everything is initialized correctly. When I do an "hciconfig -a" it shows some device "hci0", is that the bluetooth dev that I need to bring up? The status of that device is always down. If I try an "hciconfig hci0 up" I get a timeout message. Does anyone have a clear tutorial on using bluetooth because I don't what I am doing :( . In the long run I hope to create a serial link between my PC and the gumstix, maybe a secondary console on ttyS3.