It seems reasonable that the new iMac would debut in late September in Paris. This seems to be a more appropriate event for this. It also would likely be close to Leapard time, so the timing might work out well.
This leaves a lot of us (who are waiting for the new IMac) hanging for a very long time though, but this seems logical to me given all that is going on at the moment.
The other downside is that there would be a 3 month period between iPhone and the iMac upgrade. Not sure what they could fill that time with if the mini goes away as also rumored.
Late September also works well for the next gen iPod......
Maybe they'll kill the Mini, and upgrade the iMac soon and then in september release something that will replace the Mini but better