@HariSeldon85: Yeah, the JB linked in the Wiki probably won't work on 4.1.0, it's only taking running from main into account. (From what I gathered, the K4 wiki is in an, let's say 'interesting' state (and stale, at the very least), regarding accuracy... If a knowledgeable K4 user/dev has a bit of spare time, it might be nice to clean it up a bit

).
Use Yifan's original package:
http://yifan.lu/p/kindle-touch-jailbreak/
And follow the 'Universal method' from the Touch Wiki:
https://wiki.mobileread.com/wiki/Kind....tar.gz_method (or Yifan's Method 3 in the previous link, but you probably don't need the double diags reboot).
Alternatively (and possibly faster/easier), once you're in an SSH prompt in diags, you can do it by hand:
Code:
mkdir -p /tmp/root
mount -o rw "/dev/mmcblk0p1" "/tmp/root"
cat <<EOF >/tmp/root/etc/uks/pubdevkey01.pem
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJn1jWU+xxVv/eRKfCPR9e47lP
WN2rH33z9QbfnqmCxBRLP6mMjGy6APyycQXg3nPi5fcb75alZo+Oh012HpMe9Lnp
eEgloIdm1E4LOsyrz4kttQtGRlzCErmBGt6+cAVEV86y2phOJ3mLk0Ek9UQXbIUf
rvyJnS2MKLG2cczjlQIDAQAB
-----END PUBLIC KEY-----
EOF
umount /tmp/root