The only SLR-like digital camera available from Olympus at the moment is the E20, which isn't strictly a true SLR. It doesn't have detactable lenses (though you can get some add on lenses) and uses a prism to split the light between sensor and viewfinder rather than a mirror (meaning the viewfinder tends to be dimmer than a true SLR).

The E20 is also starting to look expensive now that the Canon Digital Rebel (also know as the EOS 300D in Europe) is out at under $1000 if you buy it with it's 18-55mm (28.8-88 at 35mm equivalent) lens.

Olympus do have a true DSLR on the way, the E1. That also looks quite expensive, given that it has a very similar spec to the Canon 10D, but is quite a bit more.

The Canon Digital Rebel is a far better camera than the E20, with much lower noise, a wider range of ISO/ASA settings and the flexibility of removable lenses.