CR has issued a prediction for PMA 2009, based on the rumors that they have received. PMA starts in about 3 weeks at the beginning of March, although a release of something is expected next week on February 17th/18th.
According to CR:
"Expect the following PowerShots to be replaced.
- Canon Powershot SD1100 IS
- Canon Powershot SD890 IS
- Canon Powershot SD770 IS
- Canon Powershot SD790 IS
- Canon Powershot A580
- Canon Powershot A590 IS
We've received a bunch of information about a waterproof/shockproof camera finally being launched. There’s also been a bit of information about a possible new CMOS camera being launched at PMA. "
Again, this is their prediction based on rumors they have received.
Source: CR on 2/13/2009.