Ok, so i purchased the sb-600 a while ago and since my d40 cannot trigger it wirelessly I am looking into purchasing a transmitter. However I have spent my free time the last few days searching for info. on what i need to accomplish this and cannot find anything comprehensive. I know that the sb-600 receives wireless signal, but what do i need to utilize this technology, can i use something like this http://www.adorama.com/MST.html or this http://www.adorama.com/MRWRTR4CH.html I have heard alot about the cheap ebay ones but I cannot seem to find them. Can someone please lead me in the right direction here because I am getting very frustrated. BTW: I'm sure there has already been a forum post about this already but I'm REALLY tired of searching. No need to explain everything yourself, even a link would be helpful.