Canon is due to make two annoucements in teh following days and week. The first one will be on the 19th August, which is expected a new range of IXUS and PowerShot models and possibly a G10 replacement (rumored to be a larger CMOS sensor, and maybe called the G11 or GX1 as Canon Rumors is reporting). The second annoucement will be held on the 1st of September, and it is expected a new EOS model, rumored to be the 7D.
Source: Canon Rumors