Here is a massive update on the Hermes V3 port (split in various news posts). You can find tutorial for most of these devices in the tutorial section. This one here is for the iPhone 2g/3g, iTouch tutorial below.
iPhone Hermes 3 Jailbreaking:
iPhone/iTouch (Modified iPhoDroid image, download iPhoDroid here.):
Note that your iPhone must be jailbroken with RedSn0w, reports have it that blackra1n does not work properly.
iTouch Hermes Jailbreaking:
iTouch users have to take a slightly longer route as iPhodroid does not work with this device.
Download Heremes 3 iTouch:
Please drop me a PM if you see anything wrong with the tutorials, I have not had time to test this personally.