I've decided to take the plunge and get an DSLR rather than a PS. Is dust getting on the sensor a big problem? How hard is it to clean?
For many people, cleaning the sensor is something they just get used to occasionally doing and think nothing of it. If you want a no-maintenance solution, tho, get an Olympus. The new E-510 with in-body image stabilization and liveview looks very tempting.