This is Saurik's release of Winterboard for the 3.0 jailbreak. Currently however it won't work as none of the released jailbreaks for beta 3.0 firmwares have the full complement of required patches. Specifically the vm_map needs to be patched for Winterboard to function properly on 3.0. According to some sources this patch is well in progress. The DevTeam and others likely have a good handle on it and we can probably expect rapid working jailbreak deployment once 3.0 is publicly released. Just putting this thread up for reference & for when the full 3.0 JB is released.