In defense of Olympus, hasn't his pt-23 page changed a bit? I think I recall him basically saying he couldn't stand the size of this housing and that small housings with camera packages were the vogue. He still complains about everything which adds size to the housing, but now omits references to preferring smaller housing/camera combos (once again I'm going on memory here on his statement that he preferred small housings, maybe I didn't see it).
This housing/camera combo is going to be big compared to the other offerings by Oly, Canon and such. It may have to be compared to the DSLR housings in some respects as it is definitley a larger camera. It will be curious to see how it compares to those housings once it comes out, as well as the Ikelite housing which is ommitting the internal flash option.
It's a heck of a camera and is winning most of the 8mp reviews. I suspect it'll sell well (I'm biased as I picked one up recently) and Oly should make a housing for it. People who purchase a housing sight unseen may be a bit surprised once they see it, but I was surprised when I saw a 5050 housing next to my pt-13. Size is relative. I'm leaning towards the Ikelite housing personally 'til I see the pt-23 in person... I've seen the Ikelite's Sony 828 housing and don't find it objectionally large, the Oly is supposed to be a bit smaller I think. It definitely won't be a pocket camera.
later
Steve