PSFreedom

So if you've been paying attention, the PSJailbreak sellers were stopped from selling their device. The good news is that you can getting the same functionality for free!

Several Android devices have been adapted to provide the functionality via a kernel module. You'll need to have CyanogenMod installed to do it. I've had success using my old G1 A.K.A. HTC Dream.

What else can do it?

• TI-84 calculator
• Dingoo

More information on the PSFreedom Wiki

One more note, PSFreedom only works on firmware 3.41. DO NOT INSTALL 3.42, if you want this functionality. If anyone needs a copy of the 3.41 update, just post and I'll throw it up somewhere.