The official Olympus press release will be on February 2nd, 2010 (Nikon will have a press conference on February 3rd, Canon on February 9th and Panasonic somewhere around that time too).
The new Olympus models are:
SP 600 and SP 800. The SP800 will have a 30x zoom and li-ion battery. It will look a lot like the Nikon P90 (see current Olympus SP series here).