marcus314 said:
I was wondering if anyone knew any more information on the 590ex? I thought it was supposed to debut today...
You're forgetting that this is Canon *rumors*, and while it has a nice forum I'd consider the accuracy of the information - well, how shall I put it - "less than 100% reliable"
Concerning the radio speedlites, Canon is said to have worked on them for ages, but world-wide certification for radio emissions might bring another delay. The issue is: Few people will switch to Nikon because of flash technology alone, so it won't hurt Canon at all to delay their update for some month if needed.