You might see Nikon do zooms geared toward DSLRs (but I doubt it). Sigma already has a couple zooms that they advertise as being "ideal for digital SLRs". Some odd ranges like a 15-30 and 20-40, I think.
Personally though, I think it's really a waiting game. I think those odd sizes are just a temp fix. It's only a matter of time before full size CCDs are more readily available.