iPhone hacker @p0sixninja of the Chronic Dev Team has confirmed that the Windows version of Greenpois0n will be available within 2 days, that means the next Sunday or Monday as max. Here is what he had to say:
@p0sixninja: Site issues should be better soon thanks to @iOPK. Windows version should be out tomorrow or the next day
Greenpois0n RC5 was released yesterday. For How-to Guide and iOS 4.2.1 for iPhone, iPad, iPod Downloads please check here & here.