If the guy's tried it on other Wii's successfully then I don't think he would have forgotten to connect the 3.3v.
Yes, but I can only find posts on the Wiinja and ElOtroLado forums from this same guy (ralode) who is having problems. There are several replies on ElOtroLado from people who have successfully installed the Wiinja but none with the same chip he is reporting in his Wii.