I have an iPod Touch 4G with firmware of 4.3.5 / iOS5. I can currently Tethered Jailbreak it, and I know the Untethered version is not yet available.
If I Tether jailbreak it now, will it be safe, with no problems, to Untether Jailbreak it when it is available?

Also, whats the best jailbreak program to use for my iTouch?