Also, I know there are tons of people out there with A4 or even earlier devices who wants the untether now and don't care about it could be interesting to wait A5 is finished to release or even 5.1, so that we don't waste an exploit that took me months to find and develop.
I interpret this to mean this instead:
Also, I know there are tons of people out there with an A4 device, or even earlier devices, who want the untether now and don't care about the A5 devices. It could be worthwhile to wait until the A5 device jailbreak is finished (or when iOS 5.1 is released) before releasing the A4 jailbreak so that we don't waste an exploit that took me months to find and develop.