My solar controller seems to have stopped talking over I2C bus so I
need to fire up a spare. I have a CUED board which should work OK, but
needs an image. I need I2C and USB host working, which is easiest on
old boards.

So I tried building trunk with defaults except setting 
BR2_VARIANT_CUED=y
BR2_BUILDROOT_NOV_2011=y
BR2_OPENOCD=y
# BR2_ROOTFS_YCT is not set

i.e we also have: 
BR2_KERNEL_2.6.37.6=y
BR2_YAFFS_2011-02-09=y

Should I expect this to work? 
Any general suggestion of good vintages of kernel, buildroot etc for
old double-sided CUED boards?

My buld falls over quickly with:
-----------------
make[1]: Leaving directory `/home/wookey/projects/balloon/svn/trunk/package/bootldr/src'
I: Buildroot build dependencies installed
cat: series: No such file or directory
make[1]: Entering directory `/home/wookey/projects/balloon/svn/trunk/package/buildroot/patches'
if [ -f configBalloon3-CUED-2011.11 ]; then \
		cp configBalloon3-CUED-2011.11 /home/wookey/projects/balloon/svn/trunk/build/buildroot/buildroot-2011.11/.config; \
	else \
		cp configBalloon3-2011.11 /home/wookey/projects/balloon/svn/trunk/build/buildroot/buildroot-2011.11/.config; \
	fi;
cp: cannot create regular file `/home/wookey/projects/balloon/svn/trunk/build/buildroot/buildroot-2011.11/.config': No such file or directory
make[1]: *** [/home/wookey/projects/balloon/svn/trunk/build/buildroot/buildroot-2011.11/.config] Error 1
make[1]: Leaving directory `/home/wookey/projects/balloon/svn/trunk/package/buildroot/patches'

Clues welcome, before I delve into the runes (still being somewhat
unfamiliar with the new config system). Where should that config file
be coming from?

Wookey
-- 
Principal hats:  Linaro, Emdebian, Wookware, Balloonboard, ARM
http://wookware.org/