Well we know that Canon's life cycle for their cameras is usually 12 months and that the 30D was regarded by most as a reactionary model to the Nikon D200 but it appears that the 40D is very imernant.
Canon had up the first snippets of infomation on their HK website earlier tonight. The information has all but disapeared now but this is usually how they let new slip and feed the rumours before the official announcement...
If you want to check the link its below..although what information you will find there when you check is anyones guess
Canon Hongkong Co., Ltd.
Edit...here is a screen shot of what was on there earlier...not much to wet the appetite but its definate that the 40D is comming.
I wonder what you Canon guys (and gals) are expecting the specs to be for this model an do you think it will be able to compete with the Nikon D200??