My iOS device is...

Running iOS 5.0.1.

Yes, for non-iPhone 4S and non-iPad 2 devices: redsn0w+corona.

For iPhone 4S and iPad 2, the wait continues. Check back soon!

Running iOS 5.0, 4.2.9-10, or 4.3.4-5.

A tethered jailbreak is available, but why not upgrade?

Running iOS 4.2.6 through 4.2.8, or iOS 4.3 through 4.3.3.

Open JailbreakMe on your device itself.

On iOS 4.1 through 4.2.1.

Use redsn0w and the IPSW for your firmware.