A friend who runs a tethered jb says he doesn't reboot for up to months at a time. He does not do a tremendous amount of moding though.
Re-jailbreak?!? How or why would you do this unless you had restored ?
my jailbreak is tethered and i dont have a problem with it. I do have quite afew cydias apps, such as winterboard, sbsettings, backgrounder, proswitcher, info lock, iblacklist, ibitesms. I dont know why people get so worked up about it.
For me, tethered is not that big of a deal. While I do have a lot (12+?) Cydia apps, I'm not doing any Cydia installations or deletions when away from my laptop.
I also make sure that I don't do anything that would require a reboot (like reset network settings) when out and just using it as a phone/ipod/game toy.
I use SBSettings 'free memory' option and a respring a good bit instead of a reboot, when memory starts getting low from running too many apps backgrounded.
I'm pretty sure that it does "re-jailbreak" though... Not only is it roughly the same method, but isn't it that the bootloader doesn't boot the altered kernel so the exploit needs to be run again to inject the altered kernel again and jailbreak the phone?
Not 100% on that, but I'm pretty sure that's how it works... Although, what do I know? I have a 3G and we're debating semantics! 🙂