I jailbroke my iPod touch 4g running iOS 6.1 yesterday. I got SiriPort, but it kept crashing my iPod and booting into safe mode. I reinstalled it, and took it for a test run, and of course, it crashed. This time however, it did not boot to safe mode. I shut it down, and tried to turn it back on, however, it seems to be stuck in the reboot. I have tried to restore it with iTunes, but i get errors saying that it can't connect to the iPod. It also couldn't connect to it even before it was jailbroken. Please help, Thanks!
Leave it for an hour or so. If it still isn't booting, you need to restore your iPod. I would do this ASAP, because Apple is readying for the 6.1.1 release, which may block the current evasi0n exploit.
To force restore your iPod, enter DFU mode as shown below:
After that, it should work in iTunes and you can restore.