One of the simple pleasures of the Olympus camera bodies is having good built-in image stablisation: having come from Canon where (as with most traditional SLR makers) stablisation is an in-lens option (which often pushes you into a signficant price hike), it’s nice having that facility available with any lens.
More importantly when in-body stabilisers first started appearing there was a lot of talk to the effect that they couldn’t be as effective as in-lens; it was certainly a talking point against the idea of Sony’s in-body satbilisers in their Minolta-derived DSLRs.
In practise I’m happy to consider this an academic argument as far as I’m concerned; I’ve been shooting with an Olympus body for a month, and the stabiliser has performed like a champ, including shots taken from a 1/4 scale train or with a long lens at low shutter speeds. The only downside of this is that it’s encouraging me into the “hey, maybe I should try some classic lenses” line of thinking which just adds to the list of “things that will drain your bank account”.