anyone else excited about this new flash? It was like canon was reading my post a few months ago, when I requested the 430ex to come out with the radio....finally a lightweight on camera flash with its own controller...now I am in flash heaven! I use off camera flash regularly, but always rely on my on camera flash for fill...formerly used two 600 rt's , but found that this flash was too heavy for on camera use...so I had to use my 430 ex2 with a third party controller..now I can relax and have everthing working as it should with a full canon system....BRAVO!