It seems this jailbreak has been rendered useless. Whoever was hosting the jailbreak files (Saurik?) has denied access to them. Trying to jailbreak your device using this method will most likely result in an HTTP 403 error.
The original PDF (jailbreak file) was previously hosted at www.ipad2jailbreakpdf.weebly.com, however, it has since been removed. For those of you still wanting to unofficially jailbreak your iPad 2 on iOS 4.3, download the PDF below (open it). This is the same PDF that was originally hosted. It is recommended to wait until the official jailbreak is released.