I'm just going to wait a few days myself. I assume that the Chronic dev team's JB will use GH's exploit, so what I plan to do is just wait a few days after both releases are out, which should mean that the real show stopping bugs should be worked out.
In any case, I appreciate everyone's work in doing a JB, GeoHot, the Dev Team, the Chronic Dev Team, etc.
Compared to just popping root in Android, an iPhone JB takes a lot more. One has to get code executing, get out of the BSD jail, get the code executing as root, get the code to run at startup, and finally have a mechanism for installing the basic userland (cp, mv, rm, shell), as well as Cydia. This takes an extreme amount of precise work.