When 3.0 came out I reluctantly upgrade my 3G. It finally is stable and quite nice, however I totally miss my jailbreak. 10 more days till I can have my themes and cydia back !
Plus, the dev team already has the J/B for 3.0 ready. They're probably testing it on the GM and coding pwnage/quickpwn to handle it right now, and they'll release it as soon as they get the final version, and can test it. They're fairly good about that. I just hope there's a 02.30 UL included. All in all, I wouldn't worry too much about it in the end.
Plus, the dev team already has the J/B for 3.0 ready. They're probably testing it on the GM and coding pwnage/quickpwn to handle it right now, and they'll release it as soon as they get the final version, and can test it. They're fairly good about that. I just hope there's a 02.30 UL included. All in all, I wouldn't worry too much about it in the end.