From DPR newsletter:

Today sees the announcement of three new digital cameras from
Canon. The Canon PowerShot G3 features a new 4x optical zoom lens
(F2.0 - F3.0), a re-designed body with improved hand grip and flash
as well as a host of new features (new processing, FlexiZone AE/AF,
9-point AiAF). The Canon PowerShot S45 is a 'refresh' of the
existing S40 model with most of the new features added to the G3
including the ability to take extra long movie clips when using a
fast CF card. Lastly (but not least) comes the tiny three
megapixel Digital IXUS v (EU name) / PowerShot S230 Digital ELPH
(US name), based on the previous model but now sporting three
megapixels of resolution.