4/3s "format" - virtually no downside
I have a long in the tooth E300 and it regularly produces pictures that make more expensive equipment (looking at you Nikon and Canon) look even more overpriced than they already are.
The 4/3 format allows lenses to me lighter and more compact and having IS built into the body not only works the same way but also means that ALL lenses benefit, not just particular ones (although of course how MUCH they benefit depends on the focal length of each lense).
I've been casting covetous glances in the direction of the E-520 for months now, and I'm glad I didn't succumb, cos now I get to covet the E-620 instead, and this time I'm definitely going to turn that coveting into a purchase.
Keep it up Olympus!