18.104.22.168 is now available.
The 2.6.37.x kernels seem to be shaping up. I didn't have any problems with 22.214.171.124. With any luck the .2 will be even better.
I'd say stick with 2.6.35.x if it's working well for you. I'm not too trusting of 2.6.36.x, it ha(d|s) problems. 2.6.37.x seems to be good starting with the .1 release.
Kernel and modules are available from the following locations:http://www.plugapps.com/with-linux/http://sheeva.with-linux.com/sheeva/
Features e-sata, dmcrypt, IPV6, CIFS, NFS4, EXT3, EXT4, JFS, XFS, FUSE(for ntfs-3g), UBIFS, usb-serial, uvcvideo, iptables, appletalk, bluetooth, v4l and ppp.