Unfortunately, other devices will get a tethered jailbreak, which means you will have to plug your iPhone in and launch RedSn0w every time you reboot…
It is very important to note that if you want to unlock, you should not use RedSn0w as it will update your baseband. Wait for PwnageTool to update safely without updating your baseband.
You can download RedSn0w 0.9.6b4 for Mac or Windows from our iPhone downloads section. We now have a RedSn0w tutorial up on the blog.