First of all, p0sixninja announces that shortly after the availability of iPhone 4G/HD we will have the decoding solution discovered by Sherif Hashim for baseband 05.12.01, I don't know if it will be for that baseband or if the vulnerability is also found in the new baseband in iPhone OS 4.0 and the decoding will be for the new baseband. So, after the iPhone 4G/HD release, the Dev Team will release the decoding solution that I know you've been waiting for for several months already.
In addition to the new decoding solution, posixninja also talks about the launch of a new untethered jailbreak solution, the one that geohot introduced a
already but did not use it, which will most likely be used to jailbreak iPhone OS 4.0 for all devices with new bootrom.Finally, the same p0sixninja mentions a new bootrom exploit that only geohot and those from Chronic Dev know about, an exploit that seems to be the "father" of all exploits and, I hope, will also be used to jailbreak the new iPhones 4G/HD.
To summarize, after the release of the iPhone 4G/HD we will have a new decoding solution, most likely a new jailbreak software based on an exploit already presented and a new unused exploit that I hope will be only good to be used on the iPhone 4G/HD.
Arm yourself with a lot of patience, all kinds of information will come in the coming weeks.