A nice 2.6.11-rc3-mm3 kernel configuration target in these cold winter days is 'allyesconfig'. As the name implies, it will answer yes to every kernelconfiguration question and therefore it will keep your CPU nice and hot.
For the less well-equipped people, there's the 'allnoconfig' which results in a nice and tidy 412K kernel image.
I've been playing with kexec lately and it seems to work really nice. Unfortunately, it hasn't been merged into Linus' kernel yet. I'm getting the necessary patches out of Andrew Morton's big kernel patch (2.6.10-mm3) and merging them with the ADEOS r9c3 patch for the 2.6.10 kernel. Having these patches combined would allow my LiveCD to switch various kernels without doing a full machine reboot.