GeoHot, the same person who created yiphone.org last week, has released a DFU tool for the iPhone. It uses an implementation of the same exploit that is present in PwnageTool 2.0, and allows you to do whatever you want at the iPhone’s DFU level. On his blog, he says: » GeoHot releases his DFU tool.

I wrote a quick guide to getting your iPhone or iPod touch in to DFU mode.
Please check the post here if you ever need it.

enjoy