More still to come from Canon ?

[SDK^]

We've seen the Canon 400D launched and two new L lenses but I think Canon has one more announcement still to come in the form of the Canon 1Ds MKIII. I think this will have a 22mp sensor and incorporate their newly developed DIGIC III image processor (D3 confirmed here)

With a new image processor, sensors and cleaning system I will also expect Canon to update the 30D and 1DMKIIn in Feb next year.

So, if you are thinking of upgrading your current camera (10D/20D to 30D) and unless you absolutely need it now then my advice would be to wait.

 

[SDK^]

I don't see why Canon would wait until August 07 when everything is ready to go into the new camera in time for February.
Sometimes Canon do break the 18 month cycle, look at the D60 to 10D release, there was only 6 months between them and the people who paid well over £2k for the D60 were quite annoyed that the 10D had more features, was better built and launched for approx £1400 shortly after, just ask Spie

With competition so strong in the D-SLR market Canon can't afford to wait when everything is ready.

At the end of the day it's your choice

:: EDIT ::

Cykey – you could buy a 30D now and sell your 10D next year if you felt any new cameras were worth getting.