Simon at BBCool has gotten some more confirmation on the feature sets of OS 4.5 and 4.6. OS 4.5 is still set to release this summer for everything but the 8707 which is what we expected. I am surprised it is including the 8703 versions but that has happened before.
They also have confirmed OS 4.6 for 2nd half of 08 with more of less the same features we have seen before. This time there are new screenshots of the iTunes sync, clock, & web browser upgrades.
PS: BBcool is undergoing a WordPress update today so you may experience some funkyness with their site. Right now it is showing the mobile version of their website to everybody.