MuscleNerd, who happens to be a member of iPhone Dev-Team, just showed another preview of PwnageTool 4.1 which confirms that PwnageTool 4.1 will jailbreak iOS 4.1 on iPhone 4/3GS/3G, iPod Touch 4G/3G/2G, AppleTV and iOS 3.2.2 on iPad. Last time he published a video in which he jailbreaked iOS 3.2.2 on iPad using PwnageTool 4.1.
Update via MuscleNerd:
For those who don't know, MuscleNerd also confirmed this couple of days ago that PwnageTool 4.1 will jailbreak all future firmware updates (including iOS 4.2) on A4 devices untethered, so iPhone 4, iPod Touch 4G, Apple TV 2 and iPad users will be able to enjoy untethered jailbreak on their devices. Again, super thanks to Comex, the man behind Spirit and JailbreakMe, who first provided untethered userland hacks to Geohot for his Limera1n tool and now to iPhone Dev-Team for the upcoming PwnageTool 4.1.
Update1: Download PwnageTool 4.1 to Jailbreak iPhone, iPod Touch, Apple TV & iPad
Update2: How to Jailbreak iPhone, iPod Touch, Apple TV & iPad with PwnageTool 4.1?