A4 5.0.1. untether released.

The untether is for iOS 5.0.1 on iPhone3GS, iPhone4, iPhone4-CDMA, iPad1, iPod touch 3G, iPod touch 4G

If you have one of those devices and are not on 5.0.1 yet, update now! The SHSH window is still open for 5.0.1 If you unlock via ultrasn0w or gevey, make sure you only get to 5.0.1 via a custom IPSW! See the guides at places like iClarified.com if you don’t know how. Once you’re at 5.0.1, use the latest redsn0w 0.9.10 to both jailbreak and untether.
 
If you’re already at 5.0.1 with a tethered jailbreak, you have two choices: either run redsn0w 0.9.10 over your current jailbreak (deselect “Install Cydia” if you do that), or install the Cydia package prepared by the chronic devteam. The patches are the same regardless of which you choose.

Some of you are using a hybrid 5.0/5.0.1 configuration. If so, do not attempt to install this untether over that setup! You will most likely get into a reboot cycle. Do a sync and fresh restore to 5.0.1 then install the jailbreak + untether.

As mentioned earlier, @pod2g has spent months working on all the exploits and tricks in this untether, and many of you may be wondering how you can send donations. Although the iPhone devteam itself doesn’t take donations, we thought it was appropriate to provide a link at the end of the redsn0w run for you to more easily donate directly to @pod2g if you wish (alternatively, you can go right here). There’s a link in the Cydia package for donating to the chronic devteam for the Cydia version of @pod2g’s untether.

@pod2g is now looking for a way to extend this to A5 devices. Because those devices cannot use geohot’s limera1n exploit to inject the untether, they require exploits above and beyond those used for this release. Keep following pod2g on twitter or his blog for any progress reports!

You can still download untether from cydia (if you're already tethered on 5.0.1). Search for "corona" in cydia or download it from here

redsn0w download links

redsn0w 0.9.10b1 for OS X
redsn0w 0.9.10b1 for Windows (be sure to run in Administrator mode)

Mediafire Link's thanks 2 provider

redsn0w0.9.10b1